A sealing strip for waterproofing the joints of wooden houses and its preparation method and application

Abstract

This application relates to the technical field of building waterproofing and sealing materials, specifically to a sealing strip for waterproofing and sealing gaps in wooden houses, its preparation method, and its application. The sealing strip is made from the following raw materials in parts by weight: 9-17 parts of amorphous α-olefin copolymer, 10-15 parts of low-density polyethylene wax, 5-10 parts of paraffin wax, 22-35 parts of polyisobutylene, 30-42 parts of barium sulfate powder, and 10101 parts of antioxidant. The preparation method includes: sequentially mixing polyisobutylene, amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax, and half of the barium sulfate powder in a kneader at 120°C; then adding the remaining barium sulfate powder and antioxidant and continuing mixing; after cooling, extruding through a 60°C screw extruder to form a strip arranged side-by-side. This application's adhesive strip can be manually sealed directly in the gaps of wooden houses without tools. After repair, it can be painted or sprayed without maintenance. It can be used directly on damp wooden surfaces or even underwater. It remains soft for a long time and has excellent conformability, solving the problems of existing sealing materials such as long maintenance time, inability to be applied in damp conditions, and lack of conformability.

Description

Technical Field

[0001] This application relates to the field of building waterproofing and sealing materials technology, specifically to a strip for waterproofing and sealing gaps in wooden houses and its preparation method. Background Technology

[0002] Wooden prefabricated houses, especially the detached log cabins commonly found abroad, often have roofs and walls constructed from spliced ​​wooden planks. At the junctions between the roof and walls, windows and walls, and walls and floors, gaps of varying widths can easily form due to the expansion and contraction of the wood, structural settlement, temperature changes, and vibrations from long-term use. These gaps can lead to leaks, drafts, energy loss, and mold growth on the internal structure, severely impacting the living quality and lifespan of the house.

[0003] Currently, commonly used materials for sealing and repairing gaps in wooden houses include silicone sealant, polyurethane sealant, and acrylic sealant. However, these traditional sealing materials have the following shortcomings in practical applications: (1) Long curing time: Most glass glue, polyurethane glue or acrylic glue require 2-3 days or even longer to fully cure after application before painting or spraying can be carried out. This process seriously affects construction efficiency, especially in scenarios where quick delivery or repair is required.

[0004] (2) Cannot be used in damp or underwater environments: The above-mentioned sealing materials usually require the substrate to be dry, otherwise they cannot bond effectively or may even lead to sealing failure. For wooden houses, leaks are often damp, and water may even seep in continuously during rain. If you have to wait for the gaps to dry naturally before repairing them, it will not only delay the repair but may also cause secondary damage. Existing materials cannot be directly repaired underwater or on high-humidity wooden surfaces.

[0005] (3) Lack of adaptability: Conventional sealants harden after curing and cannot adapt to changes in the width of gaps caused by temperature and humidity changes or vibrations in the wood. When the cracks shift or vibrate again, the cured sealant layer is prone to cracking and falling off, leading to secondary water leakage.

[0006] Therefore, developing a waterproof sealing strip specifically for gaps in wooden houses, which can be applied directly underwater or on damp wooden surfaces, can be painted immediately after repair without maintenance, and maintains its flexibility and conformability over a long period of time, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] This application aims to overcome the shortcomings of existing sealing materials, such as long curing time, inability to be used on damp or underwater wooden surfaces, and lack of adaptability, and provides an adhesive strip for waterproof sealing gaps in wooden houses and its preparation method. This adhesive strip can be used manually to directly seal gaps without tools, and can be painted or sprayed after repair without curing. It can be used directly underwater or on damp wooden surfaces, maintains a flexible state for a long time, and has excellent adaptability. To achieve the above objectives, this application provides the following technical solution: This application provides an adhesive strip specifically for waterproofing and sealing gaps in wooden houses, the adhesive strip comprising the following raw materials in parts by weight: 9-17 parts of amorphous α-olefin copolymer 10-15 parts of low-density polyethylene wax 5-10 parts paraffin 22-35 parts of polyisobutylene 30-42 parts of barium sulfate powder Antioxidant 1010, 1 part.

[0008] In some embodiments, the raw materials are in the following weight proportions: 12 parts amorphous α-olefin copolymer, 12 parts low-density polyethylene wax, 8 parts paraffin wax, 28 parts polyisobutylene, 39 parts barium sulfate powder, and 1 part antioxidant 1010.

[0009] In some embodiments, the adhesive strip is made from the following raw materials: amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax, polyisobutylene, barium sulfate powder, antioxidant 1010, and unavoidable impurities; and the adhesive strip does not contain fibers, petroleum resins, butyl rubber, or calcium carbonate fillers.

[0010] In some embodiments, the adhesive strips are in the form of tape arranged side by side, which the user can directly take and insert into the gaps in the wooden house.

[0011] In some embodiments, the adhesive strip has at least one of the following properties: (1) According to GBT4509-2010, the penetration is 80-90 1 / 10 mm; (2) The peel strength is ≥0.7 N / cm, as determined by GB / T 13477.18-2002; (3) Roll 10-20g of adhesive strip into a ball and soak it in 95℃ water for 24 hours. It does not dissolve. (4) According to JSCE-K532-2007, the following elongation is ≥6mm; (5) After repairing the gap on a damp wooden surface or underwater, there should be no water seepage or drop in water level within 24 hours.

[0012] This application provides a method for preparing the adhesive strip as described above, which includes the following steps: S1. Clay preparation: Heat the kneader to 110-130℃, add polyisobutylene, amorphous α-olefin copolymer and half the weight of barium sulfate powder in sequence, and stir for 30-50 minutes; then add the remaining half the weight of barium sulfate powder and antioxidant 1010, and continue stirring for 15-25 minutes; discharge the material and cool to room temperature to obtain clay; S2. Extrusion molding: Heat the screw extruder to 50-70℃, put the clay obtained in step (1) into the feed port, and extrude it through the molding die to form a tape arranged side by side; S3. Cutting: Cut the extruded tape to the predetermined length and pack it into boxes.

[0013] In some embodiments, in step S1, the stirring is carried out in a kneader at a kneader's normal rotation speed until the mixture is visually uniform before being removed from the oven.

[0014] In some embodiments, in step S2, the molding die is a die in which rubber strips are arranged side by side.

[0015] This application also provides the application of the adhesive strip as described above in waterproof sealing of gaps in wooden houses, characterized in that the application includes directly inserting the adhesive strip into the gap on a damp wooden surface or underwater for repair, and painting or spraying can be carried out without maintenance after the repair.

[0016] Compared with the prior art, the solution of this application has the following advantages: No maintenance required: The adhesive strips of this application do not require a curing period after application and can be painted or sprayed immediately, significantly shortening the construction cycle.

[0017] Moist / Underwater Application: The sealing strip of this application can directly seal gaps on damp wood surfaces or even underwater, solving the problem that traditional sealing materials must have a dry substrate.

[0018] Excellent adaptability: The adhesive strip remains permanently flexible. When the width of the gap in the wood changes due to temperature, humidity or vibration, the adhesive strip can deform accordingly, always maintaining a sealing and waterproof effect.

[0019] Excellent water resistance: The rubber strip does not dissolve or disperse when soaked in water for a long time, and its waterproof sealing performance is stable.

[0020] Easy to install: The adhesive strips are arranged in a row of tapes. Users can simply insert the strips into the gaps by hand without any tools.

[0021] In summary, the product of this application solves the problem that existing glass glue, polyurethane glue, and acrylic glue on the market require a period of curing before painting or spraying; the product can be used on damp surfaces and even for underwater repairs; the product permanently maintains a soft state and is adaptable, and can still provide a sealing and waterproofing effect even if cracks shift or vibrate. Attached Figure Description

[0022] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0023] Figure 1 This is a photograph of the adhesive strip prepared in Example 1. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To verify the effectiveness of the proposed solution, the following embodiments and comparative examples are provided: I. Formula Composition Examples and Comparative Examples 1-4 Weigh each raw material according to the weight proportions shown in Table 1.

[0027] Table 1. Formulations (parts by weight) for Example 1 and Comparative Examples 1-4 raw material Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Amorphous α-olefin copolymers 12 — 12 12 12 Low-density polyethylene wax 12 12 — 12 12 paraffin 8 8 8 — 8 Polyisobutylene 28 28 28 28 28 Barium sulfate powder 39 39 39 39 — Antioxidant 1010 1 1 1 1 1 Instructions for each formula: Example 1: Complete formulation of this application.

[0028] Comparative Example 1: Lacking amorphous α-olefin copolymers.

[0029] Comparative Example 2: Lack of low-density polyethylene wax.

[0030] Comparative Example 3: Paraffin is lacking.

[0031] Comparative Example 4: Barium sulfate powder was missing.

[0032] Examples and Comparative Examples 5-7 To further demonstrate the technical solution of this application, especially to demonstrate the irreplaceability of the specific components (paraffin, APAO) selected in this application, and the criticality of the component ratio range, the following comparative examples are added, and the formulations are shown in Table 2.

[0033] Table 2. Formulations (parts by weight) for Comparative Examples 5-7 raw material Example 1 Comparative Example 5 Comparative Example 6 Comparative Example 7 Amorphous α-olefin copolymers 12 12 — 5 Amorphous polypropylene — — 12 — Low-density polyethylene wax 12 12 12 20 paraffin 8 — 8 2 Microcrystalline wax — 8 — — Polyisobutylene 28 28 28 28 Barium sulfate powder 39 39 39 39 Antioxidant 1010 1 1 1 1 Instructions for each formula: Comparative Example 5: 8 parts paraffin wax were replaced with 8 parts microcrystalline wax (to demonstrate that paraffin wax cannot be replaced by common microcrystalline wax).

[0034] Comparative Example 6: 12 parts APAO were replaced with 12 parts amorphous polypropylene (to demonstrate that APAO cannot be replaced by other amorphous polyolefins).

[0035] Comparative Example 7: The ratio of the three components was changed (5 parts APAO, 20 parts LDPE wax, and 2 parts paraffin wax), and the total amount was 27 parts.

[0036] II. Preparation Method Taking Example 1 as an example: (1) Clay preparation: Turn on the kneader and set the heating temperature to 120℃. After reaching the set temperature, add polyisobutylene, amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax, and half of the barium sulfate powder in sequence, and stir for 40 minutes. Then add the remaining barium sulfate powder and antioxidant 1010, and continue stirring for 20 minutes until the mixture is visually homogeneous. Discharge the material and cool it to room temperature to obtain clay.

[0037] (2) Extrusion molding: Turn on the screw extruder and set the heating temperature to 60°C. After reaching the set temperature, put the above-mentioned clay into the feed port. The clay is extruded through the molding die to form a tape arranged side by side and not sticking to each other.

[0038] (3) Cutting and boxing: Cut the tape to the predetermined length and box it to obtain the finished product.

[0039] The preparation methods of Comparative Examples 1-7 are the same as those of Example 1, except that the formulations are adjusted according to Table 1 or Table 2.

[0040] III. Performance Testing The samples were tested using the following methods.

[0041] Test method: Penetration: Samples were prepared and tested according to GB / T4509-2010 (Asphalt Penetration Test Method), unit 1 / 10 mm, conditions: 100 g, 5 s.

[0042] Peel strength: Tested according to GB / T13477.18-2002, unit N / cm.

[0043] Water resistance: Take 10-20g of rubber strip, roll it into a ball, soak it in 95℃ water for 24 hours, and observe whether the mud dissolves.

[0044] Paint compatibility: Apply paint to the surface of the rubber strip, leave it for 24 hours, and observe whether the paint bubbles, peels off, or dissolves.

[0045] Repairing damp surfaces: Make a 20×20×10cm wooden box from planks, cut a 5mm wide slit on the side, soak the box in water for 24 hours, take it out, immediately fill the slit with adhesive tape, fill the box with water, and check whether the slit leaks or the water level drops significantly within 24 hours.

[0046] Underwater bonding repair: Make a wooden box with the same wooden planks, fill the box with water and keep the water intake greater than the leakage, so that the box is always full of water. After filling the gaps with adhesive strips, stop filling the water and check within 24 hours whether the gaps leak water and whether the water level drops significantly.

[0047] Follow-through: Samples were prepared and tested according to JSCE-K532-2007 (Standard Test Method for Follow-through of Coatings to Cracks), and the elongation was recorded.

[0048] (a) Test results of Example 1 and Comparative Examples 1-4 Table 3 Performance test results of Example 1 and Comparative Examples 1-4 Test Project Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Needle penetration (1 / 10 mm) 82 97 95 92 130 Peel strength (N / cm) 0.8 0.7 0.7 0.7 0.7 Water resistance (95℃ / 24h) Insoluble Dissolve Dissolve Dissolve Insoluble Paint compatibility good good good good good Adhesive repair on damp surfaces Waterproof seepage seepage seepage seepage Underwater bonding repair Waterproof seepage seepage seepage seepage Followability (mm) 6 5 5 5 5 A physical image of the adhesive strip produced in the embodiments of this application is shown below. Figure 1 As shown.

[0049] Note: "Good" means no bubbling, no peeling, and no dissolving. The same applies below.

[0050] (ii) Test results of Comparative Examples 5-7 Table 4 Performance test results for comparative examples 5-7 Test Project Example 1 Comparative Example 5 Comparative Example 6 Comparative Example 7 Needle penetration (1 / 10 mm) 82 78 85 130 Peel strength (N / cm) 0.8 0.7 0.4 0.5 Water resistance (95℃ / 24h) Insoluble Partial dissolution Dissolve Dissolve Paint compatibility good good good good Adhesive repair on damp surfaces Waterproof seepage seepage seepage Underwater bonding repair Waterproof seepage seepage seepage Followability (mm) 6 5 4 - Remark The adhesive strips are sticky and inconvenient for manual operation. Poor cohesion, cohesion is broken Note: "Good" means no bubbling, no peeling, and no dissolving.

[0051] IV. Results Analysis (a) Evidence of the synergistic effect of APAO, low-density polyethylene wax, and paraffin. Example 1 (all three components are present and in proportions within the limits of this application) does not dissolve in the water resistance test, does not leak water on wet surfaces or underwater bonding repairs, has a followability of 6mm, and exhibits excellent overall performance.

[0052] 1. The impact of missing single components Comparative Example 1 (lacking APAO): Water resistance dissipation, and bonding repairs on damp surfaces and underwater failed.

[0053] Comparative Example 2 (lacking low-density polyethylene wax): Water resistance dissipation, and failed to repair on damp surfaces and underwater.

[0054] Comparative Example 3 (without paraffin): Water resistance dissipation, and bonding repairs on damp surfaces and underwater failed.

[0055] The above results indicate that APAO, low-density polyethylene wax, and paraffin wax are all indispensable; the lack of any one of them will completely destroy the water resistance and wet / underwater adhesion properties of the adhesive strip.

[0056] 2. Irreplaceability of key components Comparative Example 5 (using microcrystalline wax instead of paraffin): Water resistance was only partially dissipated, and bonding and repair on damp surfaces and underwater still failed. Followability dropped to 5mm, and the adhesive strip was sticky and inconvenient for manual operation. This indicates that the specific hydrophobic properties and flexibility-regulating functions of paraffin cannot be replaced by microcrystalline wax.

[0057] Comparative Example 6 (using amorphous polypropylene instead of APAO): the peel strength decreased to 0.4 N / cm, the water resistance completely dissipated, and adhesive repairs on damp surfaces and underwater failed. This indicates that the adhesive skeleton and water-resistant cohesive effect of APAO cannot be replaced by other amorphous polyolefins.

[0058] 3. The criticality of component ratio Comparative Example 7 (imbalanced ratio of three components: 5 parts APAO, 20 parts LDPE wax, and 2 parts paraffin): The penetration was as high as 120, the adhesive strip was too soft, the cohesive strength was poor, it exhibited water resistance and dissolution, and cohesion was disrupted, rendering it unsuitable for practical application. This demonstrates that even with all three components present, if the ratio exceeds the limits specified in this application (9-17 parts APAO, 10-15 parts LDPE wax, and 5-10 parts paraffin), the synergistic effect is destroyed, and ideal overall performance cannot be obtained.

[0059] In summary, the adhesive strip achieves excellent water resistance and wet / underwater adhesion only when the amorphous α-olefin copolymer, low-density polyethylene wax, and paraffin are present simultaneously and within the proportions defined in this application. Changing any component (including substituting with similar materials) or adjusting the proportions leads to a significant deterioration in performance. This demonstrates an unpredictable synergistic effect among the three components, and that the proportion range defined in this application is crucial.

[0060] (II) Proof of the key role of barium sulfate powder Comparative Example 4 (without barium sulfate): The adhesive strip had a penetration of up to 130, but it was too soft and difficult to shape. Furthermore, the experiment demonstrated that without barium sulfate, the adhesive strip could not be adhered to damp surfaces or underwater wooden boards. The strip detached from the gaps in the wooden crate, rendering it ineffective as a sealant. Therefore, both damp surface and underwater bonding repairs failed.

[0061] Example 1 (39 parts of barium sulfate): moderate penetration (82), soft and malleable, with excellent water resistance and adhesion.

[0062] The above results indicate that barium sulfate not only acts as a filler but also plays a crucial role in regulating the plasticity of the adhesive strip and its adhesion to damp wood surfaces. A high dosage of 30-42 parts per part provides the adhesive strip with a suitable penetration (80-90), ensuring both plasticity to fill gaps and sufficient physical anchoring force for wet / underwater bonding. Without barium sulfate, the adhesive strip loses its plasticity and cannot achieve wet / underwater bonding.

[0063] (III) The relationship between polyisobutylene and followability Example 1 achieved a followability of 6 mm, which is higher than Comparative Examples 1-5 (5 mm) and Comparative Example 6 (4 mm). Although Comparative Example 7 had a high followability value, it had no practical application value due to cohesive failure. Polyisobutylene provides permanent flexibility and energy dissipation capability in the system of this application, which is the key to achieving followability, but it must be synergistically combined with APAO, low-density polyethylene wax, and paraffin in the proportions of this application to achieve other properties.

[0064] (iv) Overall Conclusion The technical solution of this application solves the long-standing technical problems of existing sealants, such as their inability to be applied underwater / to damp wooden surfaces, poor water resistance, and lack of adaptability, through the synergistic combination of specific components (APAO, low-density polyethylene wax, paraffin wax, high-volume barium sulfate, and polyisobutylene) and their specific proportions. Comparative examples fully demonstrate that the absence of any component, substitution of similar materials, or imbalance in proportions will not achieve the technical effect of this application. Therefore, this application possesses significant substantive features and progress, meeting the inventive step requirements of the Patent Law.

[0065] V. Discussion of the design concept and beneficial effects of this application scheme (I) Design Concept This application addresses the specific needs of waterproofing and sealing gaps in wooden houses, and designs the formula based on the following technical logic.

[0066] Firstly, regarding the choice of matrix, this application employs a hydrophobic, non-polar system. Wood crevices exist in a variable environment, frequently facing challenges such as rainwater infiltration, high humidity, and temperature changes. Traditional sealants, such as silicone sealant and polyurethane sealant, contain polar groups, are prone to absorbing water and swelling or hydrolyzing, and require curing on a dry substrate. This application selects amorphous α-olefin copolymer (APAO), low-density polyethylene wax, and paraffin wax as the main matrix. All three are non-polar, low surface energy materials with excellent hydrophobicity and low permeability, effectively blocking moisture penetration and fundamentally solving the problem of water-induced dissolution.

[0067] Secondly, this application achieves a synergistic balance among the three components. APAO, as an amorphous polyolefin, provides the main framework and cohesive strength of the adhesive strip, while also imparting good thermal stability and weather resistance. Low-density polyethylene wax adjusts the melt viscosity and extrusion molding properties of the adhesive, ensuring the shape stability of the adhesive strip during extrusion, while increasing the system's cohesion and creep resistance. Paraffin wax, as a small-molecule hydrocarbon, further enhances the system's hydrophobicity, reduces surface energy, and improves the adhesive strip's flexibility and wettability into wood crevices. All three components are indispensable, and their proportions must be appropriate: too little APAO results in insufficient framework, while too much makes the adhesive strip too hard; too little low-density polyethylene wax makes molding difficult, while too much reduces flexibility; too little paraffin wax results in insufficient hydrophobicity, while too much reduces cohesion. This application has determined the optimal proportion range (9-17 parts APAO, 10-15 parts LDPE wax, and 5-10 parts paraffin wax) through extensive experiments. Within this range, the three components work synergistically, ensuring both water resistance and achieving suitable softness and plasticity. Comparative examples 5-7 further demonstrate that replacing paraffin wax with microcrystalline wax, replacing APAO with amorphous polypropylene, or adjusting the ratio of the three will all destroy the synergistic effect and lead to a significant decrease in performance.

[0068] Third, this application uses a high amount of barium sulfate as a functional filler. Barium sulfate powder is not a common filler in this application. Its high density (4.5 g / cm³) and hydrophobic surface properties increase the physical contact pressure between the adhesive strip and the wood substrate in underwater or humid environments, creating an "anchoring effect." Simultaneously, the fine particles of barium sulfate fill the micropores on the wood surface, enhancing adhesion through mechanical interlocking. More importantly, the high dosage of 30-42 parts gives the adhesive strip a suitable penetration (80-90), neither too soft (preventing flow or cohesive failure) nor too hard (ensuring plasticity and gap filling). Comparative Example 4 shows that without any barium sulfate, the adhesive strip is too soft to fit the gaps, resulting in failed adhesion in humid / underwater environments.

[0069] Fourth, this application introduces polyisobutylene (PIB) as the source of permanent flexibility and conformability. PIB is an amorphous, highly viscoelastic polymer that imparts permanent flexibility and excellent energy dissipation to the adhesive strip. When the width of the wood gap changes due to temperature, humidity variations, or vibration, the PIB molecular chains can rearrange, causing the adhesive strip to deform without breaking, maintaining a sealed contact—a property known as "conformity." This characteristic is unmatched by rigid curing sealants.

[0070] Finally, regarding the preparation process, this application designed targeted temperature parameters and molding methods. The kneading temperature of 120℃ ensures that all components are fully melted and mixed without causing thermal degradation; the extrusion temperature of 60℃ is lower than the melting points of APAO and polyethylene wax, so that the putty has appropriate viscosity during extrusion and maintains its shape; the side-by-side tape format makes it easy for users to use directly without the need for cutting tools.

[0071] (II) Discussion of Beneficial Effects Based on the above design concept, this application has achieved the following unexpected technical effects compared to the prior art.

[0072] First, this application truly achieves direct application underwater and on damp wood surfaces. In existing technologies, even though some APAO-based tapes can be applied to dry surfaces, moisture hinders adhesion underwater or on highly humid wood surfaces. This application, through the anchoring effect of a hydrophobic matrix composed of APAO, low-density polyethylene wax, and paraffin, and a high dosage of barium sulfate, achieves, for the first time, direct sealing of wood gaps underwater. Experimental data shows that Example 1 achieved excellent results of "no drop in water level and no water seepage" in both damp surface and underwater bonding repair tests, while Comparative Examples 1-7 all failed.

[0073] Secondly, this application achieves a breakthrough in water resistance. Traditional hot-melt sealants easily dissolve or lose their adhesiveness after prolonged immersion in water. The adhesive strip of this application remains undissolved even after immersion in 95°C hot water for 24 hours, demonstrating water resistance far exceeding that of similar products. Comparative Examples 1-3 and 5-7 all showed dissolution or partial dissolution, proving that this performance can only be achieved when APAO, low-density polyethylene wax, and paraffin are present simultaneously within the proportions specified in this application.

[0074] Third, this application demonstrates the irreplaceability of key components through systematic substitution experiments. Comparative Example 5 shows that replacing paraffin wax with microcrystalline wax significantly reduces water resistance and leads to failure of wet / underwater bonding; Comparative Example 6 shows that replacing APAO with amorphous polypropylene drastically reduces peel strength and completely eliminates water resistance. This indicates that the paraffin wax and APAO selected in this application possess unique functions and cannot be replaced by similar materials commonly found in the art.

[0075] Fourth, this application reveals the crucial role of high-dosage barium sulfate in wet / underwater bonding. Comparative Example 4 shows that without any barium sulfate, the adhesive strip could not adhere to wet surfaces or underwater wooden boards, and it detached from the gaps in the wooden box, resulting in a failure to seal and thus wet / underwater bonding failure. Example 1, using 39 parts of barium sulfate, achieved excellent bonding performance due to its moderate penetration. This indicates that barium sulfate not only acts as a filler but also plays a key role in regulating the softness and plasticity of the adhesive strip; its high dosage is an important guarantee for the successful wet / underwater construction of this application.

[0076] Fifth, this application enables painting without curing. No curing time is required after application; subsequent painting can proceed immediately, significantly shortening the construction cycle. Simultaneously, the adhesive strip remains permanently flexible, with a conformity of 6mm, ensuring a seal and waterproof effect even if cracks shift or vibrations occur. In contrast, while Comparative Example 7 showed a slightly higher conformity value due to proportional imbalance, its cohesive failure rendered it impractical, demonstrating that the proportional range of this application is key to achieving optimal overall performance.

[0077] It should be noted that: The specific parameters or some commonly used reagents or raw materials in the above embodiments are specific embodiments or preferred embodiments under the concept of this application, and are not intended to limit them; those skilled in the art can make adaptive adjustments within the concept and protection scope of this application.

[0078] In addition, unless otherwise specified, the raw materials used may be commercially available products in the field or prepared by conventional methods in the field; that is, the reagents and instruments used in this embodiment do not specify the manufacturer or other information, and are all conventional products that can be purchased from the market.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0080] The specific embodiments of this application have been described above, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tape for sealing a gap in a wooden house, characterized in that, The adhesive strip comprises the following raw materials in parts by weight: 9-17 parts of amorphous α-olefin copolymer 10-15 parts of low-density polyethylene wax 5-10 parts paraffin 22-35 parts of polyisobutylene 30-42 parts of barium sulfate powder Antioxidant 1010, 1 part.

2. The adhesive strip according to claim 1, characterized in that, The weight parts of the raw materials are: 12 parts of amorphous α-olefin copolymer, 12 parts of low-density polyethylene wax 8 parts paraffin 28 parts of polyisobutylene 39 parts of barium sulfate powder Antioxidant 1010, 1 part.

3. The adhesive strip according to claim 1, characterized in that, The adhesive strip is made from the following raw materials: amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax, polyisobutylene, barium sulfate powder, antioxidant 1010, and unavoidable impurities; and the adhesive strip does not contain fibers, petroleum resin, butyl rubber, or calcium carbonate filler.

4. The adhesive strip according to claim 1, characterized in that, The adhesive strips are arranged in the form of tapes side by side.

5. A method for preparing an adhesive strip as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1. Clay preparation: Heat the kneader to 110-130℃, and add polyisobutylene, amorphous α-olefin copolymer, low-density polyethylene wax, paraffin wax and half the weight of barium sulfate powder in sequence, and stir for 30-50 minutes; then add the remaining half the weight of barium sulfate powder and antioxidant 1010, and continue stirring for 15-25 minutes; discharge the material, cool to room temperature, and obtain clay; S2. Extrusion molding: Heat the screw extruder to 50-70℃, put the clay obtained in step (1) into the feed port, and extrude it through the molding die to form a tape arranged side by side; S3. Cutting: Cut the extruded tape to the predetermined length and pack it into boxes.

6. The preparation method according to claim 5, characterized in that: In step S1, the mixing is carried out in a kneader until the mixture is visually uniform before being removed from the oven.

7. The preparation method according to claim 6, characterized in that, In step S2, the molding die is a die with rubber strips arranged side by side.

8. The application of an adhesive strip according to any one of claims 1 to 4 or an adhesive strip prepared by the method according to any one of claims 5 to 7 in waterproofing and sealing gaps in wooden houses, characterized in that, The application involves directly inserting adhesive strips into gaps on damp wooden surfaces or underwater for repair, after which no maintenance is required before painting or spraying.

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