A low-cost hot-melt pressure-sensitive adhesive and preparation method thereof

Abstract

The present application relates to the technical field of hot melt pressure-sensitive adhesives, and specifically discloses a low-cost hot melt pressure-sensitive adhesive and a preparation method thereof. A low-cost hot melt pressure-sensitive adhesive comprises the following raw materials in parts by mass: 30-50 parts of thermoplastic elastomer, 40-60 parts of tackifier, 15-25 parts of plasticizer, 0.1-1 parts of antioxidant, and 0-10 parts of filler; the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1: (1.8-3.5); the tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1: (3.2-5.5): (2.1-3.8). The hot melt pressure-sensitive adhesive prepared in the present application has excellent initial adhesion, lasting adhesion and 180° peel strength, and at the same time, the production cost is low, and the prospect of industrial production is good.

Description

Technical Field

[0001] The present application relates to the technical field of hot melt pressure sensitive adhesives, and more specifically, to a low-cost hot melt pressure sensitive adhesive and a preparation method thereof. Background Art

[0002] Hot melt pressure sensitive adhesive is a new type of hot melt adhesive that does not contain solvents and water, is pollution-free and non-carcinogenic, has a simple production process, and is an important branch of adhesives. When solid hot melt pressure sensitive adhesive is heated to 150-200°C, it becomes a fluid and produces extremely high thermal viscosity. It can be used by spraying and roller coating. When cooled to room temperature, it becomes solid again and can produce good adhesion with fingers or slight pressure. It is usually coated on paper, plastic film, fabric or metal foil to make pressure sensitive adhesive tape or pressure sensitive adhesive sheet, which is mainly used for sealing packaging or bundling of various cartons, pasting of trademarks and labels, and temporary fixation of solid parts.

[0003] In recent years, as the domestic and international market prices of various raw materials have been rising, it is of great commercial value to improve the raw material formula of hot melt pressure-sensitive adhesive and thus develop a hot melt pressure-sensitive adhesive with excellent performance and low cost. Summary of the invention

[0004] In order to improve the raw material formula of hot melt pressure-sensitive adhesive and effectively reduce the production cost on the basis of ensuring the performance of hot melt pressure-sensitive adhesive, the present application provides a low-cost hot melt pressure-sensitive adhesive and a preparation method thereof.

[0005] In the first aspect, the present application provides a low-cost hot-melt pressure-sensitive adhesive, which adopts the following technical solution:

[0006] A low-cost hot-melt pressure-sensitive adhesive comprises the following raw materials in parts by weight: 30-50 parts of a thermoplastic elastomer, 40-60 parts of a tackifier, 15-25 parts of a plasticizer, 0.1-1 parts of an antioxidant, and 0-10 parts of a filler;

[0007] The thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:(1.8-3.5);

[0008] The tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1: (3.2-5.5): (2.1-3.8).

[0009] The hot melt pressure-sensitive adhesive produced by adopting the above formula has relatively good initial adhesion, lasting adhesion and 180° peeling strength, and at the same time has low production cost and high practical value and commercial value.

[0010] From the above formula, the raw material selection has been improved on the basis of taking into account cost and performance. Specifically, styrene-butadiene-styrene block copolymer is used to replace part of styrene-isoprene-styrene block copolymer. Since the price of styrene-butadiene-styrene block copolymer is lower than that of styrene-isoprene-styrene block copolymer, and the two are used in combination according to the mass ratio in the formula, the cohesive strength of the system increases, the system's demand for thermoplastic elastomers decreases, the cost is further reduced, and the hot melt pressure-sensitive adhesive obtained after the two are compounded has better performance. In addition, terpene T-1095, terpene T-100 and C9 petroleum resin are compounded according to the mass ratio in the formula as a tackifier. Compared with terpene T-1095 commonly used in the field, terpene T-100 and C9 petroleum resin are cheaper. On the basis of partial replacement of terpene T-1095 by the two, the raw material cost is further reduced, and the compounding effect of the three is better. Therefore, based on the above-mentioned raw material improvement and formula design, on the basis of ensuring the performance of the hot melt pressure-sensitive adhesive, the production cost can be significantly reduced, and the market competitiveness is greater.

[0011] In a specific embodiment, the hot melt pressure-sensitive adhesive comprises the following raw materials in parts by weight: 38-45 parts of thermoplastic elastomer, 50-55 parts of tackifier, 20-23 parts of plasticizer, 0.3-0.6 parts of antioxidant, and 5-8 parts of filler;

[0012] The thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:(2.2-2.8);

[0013] The tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1: (4.1-4.6): (2.6-3.3).

[0014] By adopting the above technical solution, the raw material ratio in the formula is further optimized, and the obtained hot melt pressure-sensitive adhesive has better performance.

[0015] In a specific embodiment, the plasticizer is composed of dioctyl phthalate and naphthenic oil in a mass ratio of 1:(6-10).

[0016] By adopting the above technical solution and compounding dioctyl phthalate and cyclohexane oil in the above mass ratio as plasticizers, the obtained hot melt pressure-sensitive adhesive has better performance.

[0017] In a specific embodiment, the antioxidant includes at least one of antioxidant 1010 , antioxidant 168 , and antioxidant 1076 .

[0018] In a specific embodiment, the filler is composed of vulcanized rubber powder and silicon powder in a mass ratio of 1:(1.5-2.7).

[0019] By adopting the above technical solution and further adding fillers to the system, the production cost can be further reduced, and the heat resistance of the obtained hot melt pressure-sensitive adhesive can be enhanced. At the same time, it can effectively reduce the shrinkage, self-adhesion and other undesirable phenomena of the hot melt pressure-sensitive adhesive.

[0020] Vulcanized rubber powder and silicon micropowder are compounded in the above mass ratio as fillers, wherein the vulcanized rubber powder is made of waste rubber and is mechanically crushed or ground into powdery substances of different particle sizes; silicon micropowder is a powder obtained by processing pure quartz. Both are relatively low in price and can effectively reduce the production cost of hot melt pressure-sensitive adhesives. At the same time, vulcanized rubber powder is an organic filler, and silicon micropowder is an inorganic filler. After the two are compounded and added to the system, they can effectively overcome the defects that the addition of inorganic fillers will increase the brittleness of the system, and the organic fillers have high hygroscopicity and poor heat resistance. In addition, the vulcanized rubber powder has a low glass transition temperature. The vulcanized rubber powder and silicon micropowder are preheated so that the molten vulcanized rubber powder wraps the silicon micropowder, and then blended and melted with other raw materials, the silicon micropowder has better dispersion in the system. At the same time, it can also effectively improve the problem of decreased initial adhesion due to the silicon micropowder being located on the surface of the finished hot melt pressure-sensitive adhesive, and the continuity of the adhesive components in the system is guaranteed.

[0021] In summary, on the basis of further adding fillers, the cost of the hot melt pressure-sensitive adhesive is further reduced, and the bonding performance of the obtained hot melt pressure-sensitive adhesive is not significantly negatively affected, and the heat resistance and mechanical strength are improved.

[0022] In a specific embodiment, the particle size of the vulcanized rubber powder is 80-100 μm, and the particle size of the silicon powder is 0.1-0.3 μm.

[0023] In a specific embodiment, the vulcanized rubber powder and the silicon powder are both obtained by being impregnated and modified with a silane coupling agent.

[0024] By adopting the above technical solution, the modified vulcanized rubber powder and silicon micropowder are pre-impregnated with silane coupling agent, and active groups can be introduced, which can react with other raw materials in the system in the subsequent melting process, thereby helping to improve the interfacial bonding force of the vulcanized rubber powder and silicon micropowder in the system, thereby making the stability of the two in the system better. At the same time, the compatibility and bonding stability between the modified vulcanized rubber powder and silicon micropowder are significantly improved.

[0025] In a specific embodiment, the silane coupling agent is a silane coupling agent containing a carbon-carbon double bond.

[0026] By adopting the above technical scheme, a silane coupling agent containing carbon-carbon double bonds is selected to impregnate and modify the vulcanized rubber powder and silicon powder, the introduced carbon-carbon double bonds have a better combination effect with other raw materials in the system, and the obtained hot melt pressure-sensitive adhesive has better performance.

[0027] In a second aspect, the present application provides a low-cost method for preparing a hot-melt pressure-sensitive adhesive, using the following technical solution:

[0028] A method for preparing a low-cost hot-melt pressure-sensitive adhesive comprises the following steps:

[0029] A thermoplastic elastomer, a tackifier, a plasticizer, an antioxidant and a filler are mixed to obtain a mixture; the mixture is heated at 140-160° C. until the system is completely melted, and a hot melt pressure-sensitive adhesive is obtained after cooling.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. This application effectively reduces the production cost while ensuring the comprehensive performance of the hot melt pressure-sensitive adhesive by replacing part of the styrene-isoprene-styrene block copolymer with a lower-priced styrene-butadiene-styrene block copolymer and replacing part of the terpene T-1095 with a lower-priced terpene T-100 and C9 petroleum resin.

[0032] 2. The present application can further reduce costs by further adding fillers as raw materials, and in the scheme of using vulcanized rubber powder and silica powder as fillers, the combination of the two can overcome each other's shortcomings, and the bonding performance of the obtained hot-melt pressure-sensitive adhesive is not significantly negatively affected, and the heat resistance and mechanical strength are significantly improved.

[0033] 3. In the present application, the vulcanized rubber powder and the silicon micropowder are impregnated and modified in advance with a silane coupling agent, and active groups are introduced, which effectively improves the compatibility and bonding strength between the vulcanized rubber powder and the silicon micropowder. At the same time, the dispersibility and interfacial bonding strength of the vulcanized rubber powder and the silicon micropowder in the system are significantly improved, and the bonding performance of the obtained hot-melt pressure-sensitive adhesive is improved accordingly. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0035] Example 1

[0036] A low-cost hot-melt pressure-sensitive adhesive comprises the following raw materials: 40 g of thermoplastic elastomer, 53 g of tackifier, 22 g of plasticizer, and 0.5 g of antioxidant;

[0037] The thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:2.5, and the styrene-isoprene-styrene block copolymer is purchased from Baling Petrochemical, with a brand of 1106; the styrene-butadiene-styrene block copolymer is purchased from Baling Petrochemical, with a brand of 1201;

[0038] The tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1:4.3:2.8, and terpene T-1095, terpene T-100 and C9 petroleum resin (brand SK-120) are all purchased from Guangzhou Qianyiyuan Synthetic Material Technology Co., Ltd.;

[0039] The plasticizer is composed of dioctyl phthalate and naphthenic oil in a mass ratio of 1:8. The naphthenic oil is purchased from Jinan Xinhaoyuan Chemical Co., Ltd., model KN4006;

[0040] The antioxidant is antioxidant 168.

[0041] The method for preparing the above-mentioned low-cost hot-melt pressure-sensitive adhesive comprises the following steps:

[0042] First, a thermoplastic elastomer, a plasticizer and an antioxidant are mixed, and heated under stirring until the thermoplastic elastomer is completely melted; then a tackifier is added and continued heating and stirring is performed, and the temperature is controlled at 150±5°C until the system is completely melted, and a hot melt pressure-sensitive adhesive is obtained after cooling.

[0043] The difference between Example 2-5 and Example 1 is that the ratios of the raw materials are different, as shown in the following table.

[0044] Table 1 Raw material ratio table

[0045]

[0046] Example 6

[0047] The difference between this embodiment and embodiment 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:1.8.

[0048] Example 7

[0049] The difference between this embodiment and embodiment 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:3.5.

[0050] Example 8

[0051] The difference between this embodiment and embodiment 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:2.2.

[0052] Example 9

[0053] The difference between this embodiment and embodiment 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:2.8.

[0054] Example 10

[0055] The difference between this embodiment and embodiment 1 is that the tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1:3.2:2.1.

[0056] Embodiment 11

[0057] The difference between this embodiment and embodiment 1 is that the tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1:5.5:3.8.

[0058] Example 12

[0059] The difference between this embodiment and embodiment 1 is that the tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1:3.2:3.8.

[0060] Example 13

[0061] The difference between this embodiment and embodiment 1 is that the tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1:5.5:2.1.

[0062] Embodiment 14

[0063] The difference between this embodiment and embodiment 1 is that the plasticizer is composed of dioctyl phthalate and cyclohexane oil in a mass ratio of 1:6.

[0064] Embodiment 15

[0065] The difference between this embodiment and embodiment 1 is that the plasticizer is composed of dioctyl phthalate and cyclohexane oil in a mass ratio of 1:10.

[0066] Example 16

[0067] The difference between this embodiment and embodiment 1 is that the plasticizer is composed of dioctyl phthalate and cyclohexane oil in a mass ratio of 1:1.

[0068] Embodiment 17

[0069] The difference between this embodiment and embodiment 1 is that the plasticizer is composed of dioctyl phthalate and cyclohexane oil in a mass ratio of 1:15.

[0070] Embodiment 18

[0071] The difference between this embodiment and embodiment 1 is that the plasticizer is dioctyl phthalate.

[0072] Embodiment 19

[0073] The difference between this embodiment and embodiment 1 is that the plasticizer is cyclohexane oil.

[0074] Embodiment 20

[0075] The difference between this embodiment and embodiment 1 is that the hot melt pressure-sensitive adhesive includes the following raw materials: 32g of thermoplastic elastomer, 53g of tackifier, 22g of plasticizer, 0.5g of antioxidant, and 8g of filler; the filler is composed of vulcanized rubber powder and silicon powder in a mass ratio of 1:2, and the vulcanized rubber powder is purchased from Anhui Ruida Rubber Technology Co., Ltd., with a particle size of 80-100μm; the silicon powder is purchased from Donghai County Fucai Mineral Products Co., Ltd., with a particle size of 0.1-0.3μm;

[0076] The preparation method of the hot melt pressure sensitive adhesive is as follows:

[0077] Mix the vulcanized rubber powder and silica powder, and heat them while stirring until the vulcanized rubber powder is completely melted; then add the plastic elastomer, plasticizer and antioxidant and continue heating until the thermoplastic elastomer is completely melted, then add the tackifier and continue heating and stirring, controlling the temperature at 150±5℃ until the system is completely melted, and obtain the hot melt pressure-sensitive adhesive after cooling.

[0078] Embodiment 21

[0079] The difference between this embodiment and Embodiment 20 is that the mass of the filler is 8 g and the mass of the thermoplastic elastomer is 40 g.

[0080] Embodiment 22

[0081] The difference between this embodiment and Embodiment 20 is that the mass of the filler is 5 g and the mass of the thermoplastic elastomer is 35 g.

[0082] Embodiment 23

[0083] The difference between this embodiment and Embodiment 20 is that the filler is composed of vulcanized rubber powder and silicon micropowder in a mass ratio of 1:1.5.

[0084] Embodiment 24

[0085] The difference between this embodiment and Embodiment 20 is that the filler is composed of vulcanized rubber powder and silicon micropowder in a mass ratio of 1:2.7.

[0086] Embodiment 25

[0087] The difference between this embodiment and Embodiment 20 is that the filler is vulcanized rubber powder.

[0088] Embodiment 26

[0089] The difference between this embodiment and Embodiment 20 is that the filler is silicon micropowder.

[0090] Embodiment 27

[0091] The difference between this embodiment and embodiment 20 is that the vulcanized rubber powder and the silicon powder are obtained after being impregnated and modified by a silane coupling agent, and the silane coupling agent used is a silane coupling agent containing a carbon-carbon double bond, specifically KH570;

[0092] The modification operation is as follows: add the vulcanized rubber powder and silicon micropowder into the silane coupling agent respectively and immerse for 2 hours at a temperature of 40°C. After the immersion is completed, filter out the vulcanized rubber powder and silicon micropowder, and naturally dry them to obtain the modified vulcanized rubber powder and silicon micropowder.

[0093] Embodiment 28

[0094] The difference between this embodiment and embodiment 27 is that the vulcanized rubber powder is obtained after being impregnated and modified by a silane coupling agent, while the silicon micropowder is obtained without being impregnated and modified by a silane coupling agent.

[0095] Embodiment 29

[0096] The difference between this embodiment and embodiment 27 is that the vulcanized rubber powder is not obtained after being impregnated and modified by a silane coupling agent, while the silicon micropowder is obtained after being impregnated and modified by a silane coupling agent.

[0097] Embodiment 30

[0098] The difference between this embodiment and embodiment 27 is that the silane coupling agent is KH550.

[0099] Comparative Example 1

[0100] The difference between this comparative example and Example 1 is that the thermoplastic elastomer is a styrene-isoprene-styrene block copolymer.

[0101] Comparative Example 2

[0102] The difference between this comparative example and Example 1 is that the thermoplastic elastomer is a styrene-butadiene-styrene block copolymer.

[0103] Comparative Example 3

[0104] The difference between this comparative example and Example 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 2:1.

[0105] Comparative Example 4

[0106] The difference between this comparative example and Example 1 is that the thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:5.

[0107] Comparative Example 5

[0108] The difference between this comparative example and Example 1 is that the viscosity increasing agent is terpene T-1095.

[0109] Comparative Example 6

[0110] The difference between this comparative example and Example 1 is that the viscosity increasing agent is terpene T-100.

[0111] Comparative Example 7

[0112] The difference between this comparative example and Example 1 is that the tackifier is C9 petroleum resin.

[0113] Comparative Example 8

[0114] The difference between this comparative example and Example 1 is that the tackifier is composed of terpene T-1095 and terpene T-100 in a mass ratio of 1:4.3.

[0115] Comparative Example 9

[0116] The difference between this comparative example and Example 1 is that the tackifier is composed of terpene T-1095 and C9 petroleum resin in a mass ratio of 1:2.8.

[0117] Comparative Example 10

[0118] The difference between this comparative example and Example 1 is that the tackifier is composed of terpene T-100 and C9 petroleum resin in a mass ratio of 4.3:2.8.

[0119] Performance testing methods,

[0120] The hot-melt pressure-sensitive adhesives obtained in Examples 1-30 and Comparative Examples 1-10 were used as test samples, and the initial adhesion of the samples was tested with reference to GB / T4852-2002 "Test method for initial adhesion of pressure-sensitive adhesive tapes (rolling ball method)"; the persistent adhesion of the samples was tested with reference to GB / T4851-1984 "Test method for persistent adhesion of pressure-sensitive adhesive tapes"; and the 180° peel strength of the samples was tested with reference to GB / T2792-1998 "Test method for 180° peel strength of pressure-sensitive adhesive tapes".

[0121] Table 2 Test data table

[0122]

[0123]

[0124] According to the test data in Table 2, the initial adhesion of the hot-melt pressure-sensitive adhesive obtained in each embodiment of the present application is that it can adhere to a No. 18 ball or more, the stickiness can last for more than 55 hours, the 180° peel strength can reach more than 40N / 2.5cm, the bonding performance is excellent, and the production cost is relatively low.

[0125] Specifically, in combination with the test results of Example 1 and Comparative Examples 1-2, the thermoplastic elastomer in Comparative Example 1 is styrene-isoprene-styrene block copolymer, and the adhesive performance of the hot melt pressure-sensitive adhesive obtained is the same as that of Example 1. It can be seen that the use of the lower-priced styrene-butadiene-styrene block copolymer in Example 1 to replace part of the styrene-isoprene-styrene block copolymer does not have a negative impact. However, in Comparative Example 2, the thermoplastic elastomer is styrene-butadiene-styrene block copolymer, and the adhesive performance of the hot melt pressure-sensitive adhesive obtained has dropped significantly. It can be seen that when the styrene-butadiene-styrene block copolymer completely replaces the styrene-isoprene-styrene block copolymer, the effect is not good.

[0126] Specifically combining the test results of Example 1 and Comparative Examples 5-10, the tackifier in Comparative Example 5 is terpene T-1095, and the bonding performance of the hot melt pressure-sensitive adhesive obtained is slightly lower than that of Example 1, which means that the use of lower-priced terpene T-100 and C9 petroleum resin to replace part of terpene T-1095 in Example 1 not only has no negative impact, but also improves the bonding performance of the obtained hot melt pressure-sensitive adhesive to a certain extent due to the coordination between the three.

[0127] In Comparative Examples 6-7, single terpene T-100 and C9 petroleum resin were used as tackifiers, and the bonding performance of the obtained hot melt pressure-sensitive adhesives was significantly reduced compared with Example 1; while in Comparative Examples 8-10, two of the three were compounded, and the bonding performance of the obtained hot melt pressure-sensitive adhesives was still lower than that of Example 1, indicating that there is a good synergistic effect among the three.

[0128] Specifically, in combination with the test results of Example 1 and Examples 20-22, fillers were further added in Example 20 to reduce the amount of thermoplastic elastomer added, and the bonding performance of the obtained hot melt pressure-sensitive adhesive only slightly decreased compared with Example 1; after adding fillers in Example 21, the amount of thermoplastic elastomer added was not reduced accordingly, and the bonding performance was slightly better than that of Example 20. This shows that adding fillers to replace part of the thermoplastic elastomer will not have a significant negative impact. In addition, adding fillers can also effectively improve the heat resistance and mechanical strength of the hot melt pressure-sensitive adhesive, which is also of positive significance for further reducing costs.

[0129] Specifically, in combination with the test results of Example 20 and Examples 25-26, when the silicon micropowder was used alone in Example 26, the bonding performance decreased significantly, while when the vulcanized rubber powder was used alone in Example 25, the bonding performance decreased slightly. This indicates that the compounding effect of vulcanized rubber powder and silicon micropowder is better, that is, the two can overcome each other's defects.

[0130] Specifically combining the test results of Example 20 and Example 27, the hot melt pressure-sensitive adhesive bonding performance obtained by using the vulcanized rubber powder and silicon micropowder modified by the silane coupling agent in Example 27 is better than that of Example 20, and is basically the same as that of Example 1. This is because the modification of the silane coupling agent improves the compatibility and bonding strength of the vulcanized rubber powder and silicon micropowder with the system.

[0131] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A low-cost hot-melt pressure-sensitive adhesive, characterized in that: The hot melt pressure sensitive adhesive comprises the following raw materials in parts by weight: 30-50 parts of thermoplastic elastomer, 40-60 parts of tackifier, 15-25 parts of plasticizer, 0.1-1 parts of antioxidant, and 0-10 parts of filler; The thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:(1.8-3.5); The tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1: (3.2-5.5): (2.1-3.8).

2. A low-cost hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: The hot melt pressure sensitive adhesive comprises the following raw materials in parts by weight: 38-45 parts of thermoplastic elastomer, 50-55 parts of tackifier, 20-23 parts of plasticizer, 0.3-0.6 parts of antioxidant, and 5-8 parts of filler; The thermoplastic elastomer is composed of styrene-isoprene-styrene block copolymer and styrene-butadiene-styrene block copolymer in a mass ratio of 1:(2.2-2.8); The tackifier is composed of terpene T-1095, terpene T-100 and C9 petroleum resin in a mass ratio of 1: (4.1-4.6): (2.6-3.3).

3. A low-cost hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: The plasticizer is composed of dioctyl phthalate and cyclohexane oil in a mass ratio of 1: (6-10).

4. A low-cost hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: The antioxidant includes at least one of antioxidant 1010 , antioxidant 168 , and antioxidant 1076 .

5. A low-cost hot-melt pressure-sensitive adhesive according to claim 1, characterized in that: The filler is composed of vulcanized rubber powder and silicon powder in a mass ratio of 1: (1.5-2.7).

6. A low-cost hot-melt pressure-sensitive adhesive according to claim 5, characterized in that: The particle size of the vulcanized rubber powder is 80-100 μm, and the particle size of the silicon micropowder is 0.1-0.3 μm.

7. A low-cost hot-melt pressure-sensitive adhesive according to claim 5, characterized in that: The vulcanized rubber powder and the silicon micropowder are both obtained after being impregnated and modified with a silane coupling agent.

8. A low-cost hot-melt pressure-sensitive adhesive according to claim 7, characterized in that: The silane coupling agent is a silane coupling agent containing a carbon-carbon double bond.

9. A method for preparing a low-cost hot-melt pressure-sensitive adhesive according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: A thermoplastic elastomer, a tackifier, a plasticizer, an antioxidant and a filler are mixed to obtain a mixture; the mixture is heated at 140-160° C. until the system is completely melted, and a hot melt pressure-sensitive adhesive is obtained after cooling.

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