Integrated production method of hot-melt pressure-sensitive adhesive

Abstract

The invention discloses an integrated production method of a hot-melt pressure-sensitive adhesive. The integrated production method comprises the following steps: S1, raw material pretreatment: weighing an acrylate polymer, butadiene styrene rubber, a viscosity modifier, a heat stabilizer and a photoinitiator according to a ratio; s2, dissolving and dispersing: firstly mixing an acrylate polymer with styrene butadiene rubber, then adding an auxiliary agent into the dissolved acrylate polymer, and continuously stirring and mixing to ensure that the auxiliary agent is fully dispersed; the heat-resistant performance of the pressure-sensitive adhesive can be adjusted by adopting the heat stabilizer, the physical performance of the pressure-sensitive adhesive is improved, the pressure-sensitive adhesive can be cured by adopting ultraviolet light by using the photoinitiator, the curing time is shortened, the production efficiency is improved, and meanwhile, the supporting material is treated, so that the production cost is reduced. The affinity and binding force of the surface of the supporting material are improved, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt pressure sensitive adhesive production, in particular to an integrated production method of hot melt pressure sensitive adhesive. Background Art

[0002] At present, hot melt pressure sensitive adhesive is mainly made by mixing and heating synthetic rubber, resin and rubber oil. It is mainly used in sanitary materials, waterproof membranes, various carton seals, box seals, paper packaging, beverage bottle labels, sealing aluminum foil, flexible packaging and other environmentally friendly cardboard for packaging. It is suitable for various materials and has the advantages of being environmentally friendly and solvent-free.

[0003] China Patent Network discloses "An integrated device and integrated production method for producing hot-melt pressure-sensitive adhesives", application number: CN201810804057.5. This patent combines devices for preparing adhesive solution and pressure-sensitive adhesive. The present invention also provides a method for producing hot-melt pressure-sensitive adhesives using styrene-based thermoplastic elastomers. The above-mentioned integrated device can omit the hydrolysis condensation process, elastomer extrusion dehydration, granulation, drying and particle melting processes, thereby achieving the technical effect of saving energy and accelerating production efficiency. However, in the process of preparing the pressure-sensitive adhesive, this technical solution does not add a heat stabilizer, which will affect the stability of the pressure-sensitive adhesive, and in the coating process, the supporting material is not pretreated, and its coating affinity and bonding strength are poor, which affects the coating effect and subsequent use. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated production method of a hot melt pressure sensitive adhesive, which has the advantages of strong stability and good use effect.

[0005] To achieve the above object, the present invention provides the following technical solution: a hot melt pressure sensitive adhesive, comprising the following components:

[0006] Acrylate polymer 40-60%;

[0007] Styrene butadiene rubber 20-40%;

[0008] Viscosity modifier 1-10%;

[0009] Heat stabilizer 1-5%;

[0010] Photoinitiator 1-5%.

[0011] Preferably, the viscosity regulator is polyurethane, the heat stabilizer is phosphites, and the photoinitiator is phenyl nitrobenzophenone.

[0012] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0013] S1 Raw material pretreatment: Weigh the acrylic polymer, styrene-butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion;

[0014] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue to stir and mix to ensure that the additive is fully dispersed;

[0015] S3 filtration: filtering the mixed colloid adhesive through a filter to remove impurities and solid particles;

[0016] S4 degassing: degassing the colloidal adhesive under vacuum conditions to remove bubbles;

[0017] S5 coating: coating the colloidal adhesive after filtering and degassing on the support material;

[0018] S6 curing: thermal curing is used to place the coated support material in a constant temperature box or oven for the required temperature and time curing;

[0019] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0020] Preferably, in step S1, the acrylic polymer and styrene-butadiene rubber are filtered before weighing.

[0021] Preferably, in step S2, the dissolution temperature is 30-60° C., and the rotation speed of the equipment during dispersion is 60-100 rpm.

[0022] Preferably, in step S3, the pore size of the filter is 10-100 microns.

[0023] Preferably, in step S4, a vacuum tank or a vacuum chamber is used for degassing treatment, and the pressure is between 5-50 mbar.

[0024] Preferably, in step S5, a spray gun is used for coating at a coating speed of 0.1-10 m / min, and a silane coupling agent or a polymer binder is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0025] Preferably, in step S6, the curing temperature is 60-150° C., and the curing time is 0.5-2 h.

[0026] Preferably, in step S6, ultraviolet curing may be used, with the ultraviolet radiation intensity being 100-1000 mW / cm2 and the irradiation time being between 30-60 s.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention can adjust the heat resistance of the pressure-sensitive adhesive by adopting a heat stabilizer to improve its physical properties, and through the use of a photoinitiator, the pressure-sensitive adhesive can be cured by ultraviolet light, thereby shortening the curing time and improving production efficiency. At the same time, by processing the supporting material, the affinity and bonding force of the surface of the supporting material are improved, thereby improving the quality of the product. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] Acrylate polymer 45%;

[0032] Styrene butadiene rubber 40%;

[0033] Viscosity modifier 10%;

[0034] Heat stabilizer 2%;

[0035] Photoinitiator 3%.

[0036] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0037] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0038] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0039] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0040] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0041] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0042] S6 curing: thermal curing is adopted, and the coated support material is placed in a constant temperature box for curing at the required temperature and time; the curing temperature is 100°C and the curing time is 1 hour.

[0043] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0044] Embodiment 2

[0045] Acrylate polymer 50%;

[0046] Styrene butadiene rubber 35%;

[0047] Viscosity modifier 10%;

[0048] Heat stabilizer 2%;

[0049] Photoinitiator 3%.

[0050] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0051] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0052] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0053] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0054] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0055] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0056] S6 curing: thermal curing is adopted, and the coated support material is placed in a constant temperature box for curing at the required temperature and time; the curing temperature is 100°C and the curing time is 1 hour.

[0057] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0058] Embodiment 3

[0059] Acrylate polymer 50%;

[0060] Styrene butadiene rubber 30%;

[0061] Viscosity modifier 10%;

[0062] Heat stabilizer 5%;

[0063] Photoinitiator 5%.

[0064] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0065] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0066] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0067] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0068] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0069] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0070] S6 curing: thermal curing is adopted, and the coated support material is placed in a constant temperature box for curing at the required temperature and time; the curing temperature is 100°C and the curing time is 1 hour.

[0071] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0072] Embodiment 4

[0073] Acrylate polymer 55%;

[0074] Styrene butadiene rubber 30%;

[0075] Viscosity modifier 5%;

[0076] Heat stabilizer 5%;

[0077] Photoinitiator 5%.

[0078] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0079] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0080] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0081] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0082] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0083] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0084] S6 curing: When the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 600 mW / cm2 and the irradiation time is 40 s.

[0085] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0086] Embodiment 5

[0087] Acrylate polymer 55%;

[0088] Styrene butadiene rubber 30%;

[0089] Viscosity modifier 5%;

[0090] Heat stabilizer 5%;

[0091] Photoinitiator 5%.

[0092] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0093] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0094] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0095] S3 Filtration: Filter the mixed colloid adhesive through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0096] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0097] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0098] S6 curing: When the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 600 mW / cm2 and the irradiation time is 40 s.

[0099] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0100] Embodiment 6

[0101] Acrylate polymer 45%;

[0102] Styrene butadiene rubber 40%;

[0103] Viscosity modifier 10%;

[0104] Heat stabilizer 2%;

[0105] Photoinitiator 3%.

[0106] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0107] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0108] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0109] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0110] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0111] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0112] S6 curing: When the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 600 mW / cm2 and the irradiation time is 40 s.

[0113] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0114] Embodiment 7

[0115] Acrylate polymer 50%;

[0116] Styrene butadiene rubber 35%;

[0117] Viscosity modifier 10%;

[0118] Heat stabilizer 2%;

[0119] Photoinitiator 3%.

[0120] An integrated production method for a hot melt pressure sensitive adhesive comprises the following steps:

[0121] S1 raw material pretreatment: weigh the acrylic polymer, styrene butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; filter the acrylic polymer and styrene butadiene rubber before weighing.

[0122] S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue stirring and mixing to ensure that the additive is fully dispersed; the dissolution temperature is 40°C, and the speed of the equipment during dispersion is 70 rpm.

[0123] S3 Filtration: The mixed colloidal adhesive is filtered through a filter to remove impurities and solid particles; the filter pore size is 50 microns.

[0124] S4 Degassing: Degassing of the colloidal adhesive under vacuum conditions to remove air bubbles; degassing is performed using a vacuum tank with a pressure of 30 mbar.

[0125] S5 coating: the colloidal adhesive after filtering and degassing is coated on the support material; a spray gun is used for coating at a coating speed of 30 m / min, and a silane coupling agent is brushed on the surface of the support material to provide better coating affinity and bonding strength.

[0126] S6 curing: When the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 600 mW / cm2 and the irradiation time is 40 s.

[0127] S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

[0128] For the hot melt pressure sensitive adhesives prepared in Comparative Examples 1-6, Blank Experiment Group 1 and Example 2, only the temperature of the thermostatic box was adjusted during curing.

[0129] Specific

[0130] In comparative example 1, heat curing was adopted, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 80° C. and the curing time was 1 hour.

[0131] In comparative example 2, heat curing was adopted, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 90° C. and the curing time was 1 hour.

[0132] In comparative example 3, heat curing was adopted, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 110° C. and the curing time was 1 hour.

[0133] In comparative example 4, heat curing was adopted, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 120° C. and the curing time was 1 hour.

[0134] In comparative example 5, heat curing is adopted, and the coated support material is placed in a constant temperature box for curing at the required temperature and time; the curing temperature is 130° C. and the curing time is 1 hour.

[0135] In Comparative Example 6, thermal curing was adopted, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 140° C. and the curing time was 1 hour.

[0136] Blank experiment group 1: thermal curing was used, and the coated support material was placed in a constant temperature box for curing at the required temperature and time; the curing temperature was 80° C. and the curing time was 1 h.

[0137] Viscosity test:

[0138] The hot melt pressure-sensitive adhesive samples prepared in Comparative Examples 1-6, Example 2 and Blank Experiment Group 1 were placed in a viscometer.

[0139] And record the viscosity value of each sample.

[0140] Support material affinity test:

[0141] The samples of the hot melt pressure sensitive adhesives of ratios 1-6, blank experimental group 1 and Example 2 were coated on the surfaces of two groups of supporting materials, one of which was ordinary supporting material 1 and the other was supporting material 2, the surface of which was coated with a silane coupling agent.

[0142] Observe the flow state of the sample on the surface of the support material and record the test results.

[0143] Thermal stability test:

[0144] step:

[0145] The samples prepared in Comparative Examples 1-6, Blank Experiment Group 1 and Example 2 were placed in a constant temperature box.

[0146] The appearance changes of the samples were observed at 1 h time intervals.

[0147] The test results are as follows

[0148]

[0149]

[0150] In summary, in the present technical solution, a support material coated with a material is used, and its adhesion to the colloid is improved, thereby reducing the slight flow of the colloid during curing.

[0151] For the hot melt pressure sensitive adhesives prepared in Comparative Examples 7-12, Blank Experiment Group 2 and Example 7, only the ultraviolet radiation intensity was adjusted during curing.

[0152] Specific

[0153] In comparative example 7, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 400 mW / cm2 and the irradiation time is 40 s.

[0154] In Comparative Example 8, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 500 mW / cm2 and the irradiation time is 40 s.

[0155] In comparative example 9, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 700 mW / cm2 and the irradiation time is 40 s.

[0156] In comparative example 10, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 800 mW / cm2 and the irradiation time is 40 s.

[0157] In Comparative Example 11, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 900 mW / cm2 and the irradiation time is 40 s.

[0158] In Comparative Example 12, when the coated support material is cured by ultraviolet light, the ultraviolet radiation intensity is 1000 mW / cm2, and the irradiation time is 40 s.

[0159] Viscosity test:

[0160] The hot melt pressure-sensitive adhesive samples prepared in Comparative Examples 7-12, Example 7 and Blank Experiment Group 2 were placed in a viscometer.

[0161] Start the test and record the viscosity value of each sample.

[0162] Thermal stability test:

[0163] step:

[0164] The samples prepared in Comparative Examples 7-12, Example 7 and Blank Experiment Group 2 were placed in a constant temperature box.

[0165] The appearance changes of the samples were observed at 1 h time intervals.

[0166] The test results are as follows

[0167] Viscosity(cP) Thermal stability Comparative Example 7 42000 No color change Comparative Example 8 43000 No color change Comparative Example 9 44000 No color change Comparative Example 10 44000 No color change Comparative Example 11 45000 No color change Comparative Example 12 43000 No color change Blank experimental group 2 38000 Discoloration Embodiment 7 49000 No color change

[0168] In summary, the technical solution has better performance and a larger viscosity coefficient when cured by ultraviolet light.

[0169] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0170] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot melt pressure sensitive adhesive, characterized in that: The components include: Acrylate polymer 40-60%; Styrene butadiene rubber 20-40%; Viscosity modifier 1-10%; Heat stabilizer 1-5%; Photoinitiator 1-5%.

2. A hot melt pressure sensitive adhesive according to claim 1, characterized in that: The viscosity regulator is polyurethane, the heat stabilizer is phosphites, and the photoinitiator is phenyl nitrobenzophenone.

3. An integrated production method for a hot melt pressure sensitive adhesive, characterized in that: The following steps are involved: S1 Raw material pretreatment: Weigh the acrylic polymer, styrene-butadiene rubber, viscosity modifier, heat stabilizer and photoinitiator according to the proportion; S2 dissolution and dispersion: first mix the acrylic polymer with styrene-butadiene rubber, then add the additive to the dissolved acrylic polymer, and continue to stir and mix to ensure that the additive is fully dispersed; S3 filtration: filtering the mixed colloid adhesive through a filter to remove impurities and solid particles; S4 degassing: degassing the colloidal adhesive under vacuum conditions to remove bubbles; S5 coating: coating the colloidal adhesive after filtering and degassing on the support material; S6 curing: thermal curing is used to place the coated support material in a constant temperature box or oven for the required temperature and time curing; S7 Cutting: Cut the cured colloid adhesive and support material into the required size and shape.

4. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In the step S1, the acrylic polymer and styrene-butadiene rubber are filtered before weighing.

5. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In the step S2, the dissolving temperature is 30-60°C, and the rotation speed of the equipment during dispersion is 60-100 rpm.

6. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In step S3, the pore size of the filter is 10-100 microns.

7. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In step S4, a vacuum tank or a vacuum chamber is used for degassing, and the pressure is between 5-50 mbar.

8. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In the step S5, a spray gun is used for coating at a coating speed of 0.1-10 m / min, and a silane coupling agent or a polymer binder is brushed on the surface of the support material to provide better coating affinity and bonding strength.

9. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In step S6, the curing temperature is 60-150° C., and the curing time is 0.5-2 h.

10. The integrated production method of a hot melt pressure sensitive adhesive according to claim 3, characterized in that: In the step S6, ultraviolet curing may also be used, with the ultraviolet radiation intensity being 100-1000 mW / cm2 and the irradiation time being between 30-60 s.

Images