Polymer film-based self-adhesive waterproof coiled material with magic tape structure and preparation method of polymer film-based self-adhesive waterproof coiled material

Abstract

The invention relates to the technical field of waterproof coiled materials, and provides a polymeric membrane-based self-adhesive waterproof coiled material with a hook-and-loop fastener structure and a preparation method thereof.The polymeric membrane-based self-adhesive waterproof coiled material with the hook-and-loop fastener structure sequentially comprises a hook-and-loop fastener layer, an asphalt self-adhesive layer I, a polymeric membrane-based reinforcing layer, an asphalt self-adhesive layer II and an isolation sand layer from top to bottom; the upper surface of the asphalt self-adhesion layer I is covered with a hook-and-loop fastener layer and a lap edge isolation film I. The lower surface of the asphalt self-adhesion layer II is covered with isolation sand and a lap edge isolation film II. The asphalt self-adhesive layer I and the asphalt self-adhesive layer II are both made of polymer modified asphalt self-adhesive materials, and the polymer modified asphalt self-adhesive materials comprise the following raw materials in parts by weight: asphalt, a polymer modifier, a softener, a filler, a tackifier, stearic acid and dodecanedioic acid. By means of the technical scheme, the problems that in the related technology, the peeling strength of a polymeric membrane-based self-adhesive waterproof roll is low, and adjustment cannot be conducted after laying are solved.

Description

Technical Field

[0001] This invention relates to the field of waterproof membranes, specifically to a polymer film-based self-adhesive waterproof membrane with Velcro structure and its preparation method. Background Technology

[0002] Polymer-based self-adhesive waterproof membrane is an energy-saving and low-carbon waterproof material. Due to its characteristics of not requiring heat treatment, high safety, good flexibility, and good adhesion to complex substrates, its application has become increasingly widespread in recent years, used in various industrial and civil waterproofing projects as well as large-scale infrastructure projects. It is generally divided into two types according to the adhesive: bitumen-based and non-bitumen-based. Both bitumen-based and non-bitumen-based materials have excellent adhesion properties, and the thickness of this type of material is generally less than 2mm. It is particularly suitable for special areas (such as corners, parapet walls, pipe roots, pile heads), offering high construction efficiency, good waterproofing effect, and low construction cost.

[0003] However, ordinary polymer-based self-adhesive waterproof membranes, whether single-sided or double-sided, have various problems. From a construction perspective, if backfilling is not done for an extended period after construction, slippage can occur. Furthermore, the polymer membrane is easily punctured or broken under structural stress or external impact. Additionally, once the release liner is removed, any deviation in the laying direction cannot be corrected. These issues limit its further promotion. Summary of the Invention

[0004] This invention proposes a polymer film-based self-adhesive waterproof membrane with a Velcro structure and its preparation method, which solves the problems of low peel strength and inability to adjust after laying in related technologies.

[0005] The technical solution of the present invention is as follows: This invention proposes a polymer film-based self-adhesive waterproof membrane with a hook and loop fastener structure. Its features include, from top to bottom, a hook and loop fastener layer, an asphalt self-adhesive layer I, a polymer film-based reinforcing layer, an asphalt self-adhesive layer II, and a separating sand layer. The upper surface of the asphalt self-adhesive layer I is covered with a hook and loop fastener layer and an overlapping edge separating film I, and the lower surface of the asphalt self-adhesive layer II is covered with separating sand and an overlapping edge separating film II. The materials for both the asphalt self-adhesive layer I and the asphalt self-adhesive layer II are polymer-modified asphalt self-adhesive materials. The polymer-modified asphalt self-adhesive materials include the following raw materials in parts by weight: 45-55 parts asphalt, 10-15 parts polymer modifier, 5-10 parts softener, 15-20 parts filler, 4-6 parts tackifier, 4-6 parts stearic acid, and 2-3 parts dodecanoic acid.

[0006] As a further technical solution, the mass ratio of stearic acid to dodecanoic acid is 2:1.

[0007] As a further technical solution, the polymer film-based reinforcing layer is obtained by hot-pressing three layers of polyethylene film that are cross-stacked at a 45° angle to each other.

[0008] As a further technical solution, the raw materials of the polyethylene film include the following components by weight: 50-60 parts high-density polyethylene, 40-60 parts low-density polyethylene, 8-12 parts ethylene-vinyl acetate copolymer, and 10-14 parts ethylene-acrylate copolymer.

[0009] As a further technical solution, the method for preparing the polymer film-based reinforcing layer includes the following steps: A1. After the raw materials of the polyethylene film are mixed evenly, the film is melt blown to obtain a base film. The base film is then stretched twice and heat-set to obtain a polymer film. A2. The polymer film is spirally cut along a direction with an angle of 30~60° to the longitudinal stretching direction of the polymer film to obtain multiple polyethylene film semi-finished products; A3. The three polyethylene film semi-finished products are hot-pressed and cross-laminated at a 45° angle to obtain a polymer film base reinforcement layer.

[0010] As a further technical solution, the polymer modifier includes one or more of SBS, SIS, and polyethylene wax.

[0011] As a further technical solution, the polymer modifier is SBS.

[0012] As a further technical solution, the filler includes one or more of talc, titanium dioxide, and calcium carbonate.

[0013] As a further technical solution, the tackifier includes one or more of C5 resin, C9 resin, terpene resin and rosin resin.

[0014] As a further technical solution, the tackifier is rosin resin.

[0015] As a further technical solution, the rosin resin is composed of F-1101 rosin resin and F-1103 rosin resin.

[0016] As a further technical solution, the mass ratio of F-1101 rosin resin to F-1103 rosin resin is 1:1 to 2, for example, it can be 1:1, 1:1.5, or 1:2, but is not limited to the listed mass ratios.

[0017] As a further technical solution, the softener includes naphthenic oil.

[0018] As a further technical solution, the overlapping edge release film I and the overlapping edge release film II are each independently one of PE release film and PET release film.

[0019] As a further technical solution, the thickness of the overlapping edge isolation film I and the overlapping edge isolation film II is independently 0.02~0.2mm.

[0020] As a further technical solution, the thickness of the polymer film-based reinforcing layer is 0.05 mm.

[0021] As a further technical solution, the thickness of the asphalt self-adhesive layer I and the asphalt self-adhesive layer II are each independently 0.6~0.9mm.

[0022] As a further technical solution, the thickness of the Velcro layer is 0.5~3.0mm.

[0023] This invention also proposes a method for preparing a polymer film-based self-adhesive waterproof membrane with a hook-and-loop fastener structure, which includes the following steps: S1. After heating the asphalt to 140~150℃, mix it with the remaining components in the raw materials of the polymer-modified asphalt self-adhesive material at 170~180℃ for 2~3 hours to obtain the polymer-modified asphalt self-adhesive material. S2. The polymer-modified asphalt self-adhesive material is applied to the upper and lower surfaces of the polymer film-based reinforcement layer to form asphalt self-adhesive layer I and asphalt self-adhesive layer II, respectively. S3. After covering the upper surface of the asphalt self-adhesive layer I with the hook and loop layer and the overlapping edge release film I, and covering the lower surface of the asphalt self-adhesive layer II with the release sand layer and the overlapping edge release film II, a polymer film-based self-adhesive waterproof membrane with a hook and loop structure is obtained.

[0024] As a further technical safeguard, the mixing in step S1 is carried out by stirring at a shear rate of 900~1000 r / min.

[0025] The working principle and beneficial effects of this invention are as follows: The Velcro structure of the polymer film-based self-adhesive waterproof membrane in this invention solves the problem of the inability to adjust the waterproof membrane after installation. Furthermore, the addition of dodecanoic acid to the asphalt self-adhesive layer better enhances the dispersibility and peel strength of the filler in the asphalt self-adhesive layer, working in conjunction with stearic acid. In existing technologies, stearic acid is often added as a processing aid to the components of the asphalt self-adhesive layer. However, adding only stearic acid, while increasing the amount to further improve the peel strength of the waterproof membrane, can actually lead to a decrease in peel strength. Therefore, the effect of stearic acid on improving the peel strength of waterproof membranes is limited. This invention, by further introducing dodecanoic acid on top of stearic acid, can better improve the peel strength of the waterproof membrane and reduce the difficulty of construction. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] In the following embodiments and comparative examples: F-1101 rosin resin, F-1102 rosin resin, and F-1103 rosin resin were all purchased from Foshan Fangxiang Chemical Co., Ltd.; SBS: Model 791E, Baling Petrochemical; Naphthenic oil: Model KN4010; High-density polyethylene: Grade BE0400, LG Korea; Low-density polyethylene: Item No. 1C7A, Sinopec Yanshan; Talc powder: Average particle size 1250 mesh; Ethylene-vinyl acetate copolymer: Grade 18J3-GB, Yanshan Petrochemical; Ethylene-acrylate copolymer, Grade 8940, DuPont USA.

[0028] Example 1 Polymer-modified asphalt self-adhesive material comprises the following raw materials in parts by weight: 45 parts 70# asphalt, 10 parts SBS, 5 parts naphthenic oil, 15 parts talc, 4 parts tackifier, 4.5 parts stearic acid, and 3 parts dodecanoic acid; wherein the tackifier is F-1101 rosin resin. A method for preparing a polymer film-based self-adhesive waterproof membrane with a Velcro structure includes the following steps: S1. After heating the asphalt to 150°C, stir it with the remaining components in the above polymer-modified asphalt self-adhesive material at 180°C and a shear rate of 1000 r / min for 2 hours to obtain the polymer-modified asphalt self-adhesive material. S2. The polymer-modified asphalt self-adhesive material is applied to the upper and lower surfaces of the polymer film-based reinforcement layer to form asphalt self-adhesive layer I with a thickness of 0.9 mm and asphalt self-adhesive layer II with a thickness of 0.9 mm. S3. A 1.5mm thick hook and loop fastener layer and a 0.05mm thick overlap-edge release film I are applied to the upper surface of the asphalt self-adhesive layer I. An isolation sand layer and a 0.05mm thick overlap-edge release film II are applied to the lower surface of the asphalt self-adhesive layer II to obtain a polymer membrane-based self-adhesive waterproof membrane with a hook and loop fastener structure. Both overlap-edge release film I and overlap-edge release film II are PE release films. The method for preparing the polymer film-based reinforcing layer includes the following steps: A1. After the raw materials for polyethylene film are mixed evenly, the film is melt blown to obtain a base film. The base film is then stretched twice and heat-set to obtain a polymer film. A2. The polymer film is spirally cut along a direction that makes an angle of 60° with the longitudinal stretching direction of the polymer film to obtain multiple polyethylene film semi-finished products. A3. The three polyethylene film semi-finished products prepared in step A2 are hot-pressed and cross-laminated at an angle of 45° to obtain a polymer film base reinforcement layer with a thickness of 0.05mm. The raw materials for the polymer membrane reinforcement layer include the following components by weight: 50 parts high-density polyethylene, 40 parts low-density polyethylene, 8 parts ethylene-vinyl acetate copolymer, and 10 parts ethylene-acrylate copolymer.

[0029] Example 2 Polymer-modified asphalt self-adhesive material comprises the following raw materials in parts by weight: 55 parts 70# asphalt, 15 parts SBS, 10 parts naphthenic oil, 20 parts talc, 6 parts tackifier, 6 parts stearic acid, and 3 parts dodecanoic acid; wherein the tackifier is F-1101 rosin resin. A method for preparing a polymer film-based self-adhesive waterproof membrane with a Velcro structure includes the following steps: S1. After heating the asphalt to 150°C, stir it with the remaining components in the above polymer-modified asphalt self-adhesive material at 180°C and a shear rate of 1000 r / min for 2 hours to obtain the polymer-modified asphalt self-adhesive material. S2. The polymer-modified asphalt self-adhesive material is applied to the upper and lower surfaces of the polymer film-based reinforcement layer to form asphalt self-adhesive layer I with a thickness of 0.9 mm and asphalt self-adhesive layer II with a thickness of 0.9 mm. S3. A 1.5mm thick hook and loop fastener layer and a 0.05mm thick overlap-edge release film I are applied to the upper surface of the asphalt self-adhesive layer I. An isolation sand layer and a 0.05mm thick overlap-edge release film II are applied to the lower surface of the asphalt self-adhesive layer II to obtain a polymer membrane-based self-adhesive waterproof membrane with a hook and loop fastener structure. Both overlap-edge release film I and overlap-edge release film II are PE release films. The method for preparing the polymer film-based reinforcing layer includes the following steps: A1. After the raw materials for polyethylene film are mixed evenly, the film is melt blown to obtain a base film. The base film is then stretched twice and heat-set to obtain a polymer film. A2. The polymer film is spirally cut along a direction that makes an angle of 60° with the longitudinal stretching direction of the polymer film to obtain multiple polyethylene film semi-finished products. A3. The three polyethylene film semi-finished products prepared in step A2 are hot-pressed and cross-laminated at an angle of 45° to obtain a polymer film base reinforcement layer with a thickness of 0.05mm. The raw materials for polyethylene film include the following components in parts by weight: 60 parts high-density polyethylene, 60 parts low-density polyethylene, 12 parts ethylene-vinyl acetate copolymer, and 10 parts ethylene-acrylate copolymer.

[0030] Example 3 Compared with Example 1, the only difference in this example is that stearic acid is 5 parts and dodecanoic acid is 2.5 parts.

[0031] Example 4 Compared with Example 1, the only difference in this example is that stearic acid is 5.5 parts and dodecanoic acid is 2 parts.

[0032] Example 5 Compared with Example 1, the only difference in this example is that the tackifier is composed of F-1101 rosin resin and F-1103 rosin resin in a mass ratio of 1:2.

[0033] Example 6 Compared with Example 1, the only difference in this example is that the tackifier is F-1102 rosin resin.

[0034] Example 7 Compared with Example 1, the only difference in this example is that the tackifier is F-1103 rosin resin.

[0035] Example 8 Compared with Example 1, the only difference in this example is that the tackifier is composed of F-1101 rosin resin and F-1103 rosin resin in a mass ratio of 1:1.

[0036] Example 9 Compared with Example 1, the only difference in this example is that the tackifier is composed of F-1101 rosin resin and F-1102 rosin resin in a mass ratio of 1:1.

[0037] Example 10 Compared with Example 1, the only difference in this example is that the tackifier is composed of F-1103 rosin resin and F-1102 rosin resin in a mass ratio of 1:1.

[0038] Comparative Example 1 Compared with Example 1, the only difference in this comparative example is that stearic acid is replaced with an equal amount of dodecanoic acid.

[0039] Comparative Example 2 Compared with Example 1, the only difference in this comparative example is that dodecanoic acid is replaced with an equal amount of stearic acid.

[0040] Comparative Example 3 Compared with Example 1, the only difference in this comparative example is that dodecanoic acid is replaced with an equal amount of silane coupling agent KH-550.

[0041] Comparative Example 4 Compared with Example 3, the only difference in this comparative example is that stearic acid is replaced with an equal amount of silane coupling agent KH-550.

[0042] Experimental Example The performance of the polymer film-based self-adhesive waterproof membranes with Velcro structures in Examples 1-10 and Comparative Examples 1-4 was determined using the following methods: (1) Peel strength: The peel strength between the waterproof membranes was determined according to the test method in GB / T23457-2017 "Pre-laid waterproof membranes". The test results are shown in Table 1. (2) Waterproofing effect: The waterproofing effect was determined according to the test method in GB / T23457-2017 "Pre-laid waterproof membrane", and the time when water permeation occurred was recorded. The test pressure was 0.3MPa. The test results are shown in Table 2. (3) Puncture resistance: The puncture resistance was determined according to the test method in GB / T23457-2017 "Pre-laid waterproof membrane". The test results are shown in Table 3.

[0043] Table 1. Peel strength test results of Examples 1-4 and Comparative Examples 1-4

[0044] As shown in Table 1, the peel strength of Examples 1-4 of the present invention is greater than that of Comparative Examples 1-4, indicating that the simultaneous addition of stearic acid and dodecanoic acid can improve the peel strength of the waterproof membrane.

[0045] Table 2. Waterproofing effect test results of Examples 1 and 7-8

[0046] As shown in Table 2, the waterproof membrane of the present invention has good waterproof performance.

[0047] Table 3. Puncture resistance test results of Examples 1, 6-10

[0048] As shown in Table 3, the puncture resistance of Example 8 of the present invention is higher than that of Examples 1, 6-7, and 9-10, indicating that the simultaneous addition of F-1101 rosin resin and F-1103 rosin resin can improve the puncture resistance of the waterproof membrane.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polymer film-based self-adhesive waterproofing membrane with a magic tape structure, characterized in that, From top to bottom, the self-adhesive waterproofing membrane with magic tape structure includes a magic tape layer, an asphalt self-adhesive layer I, a polymer film base reinforcing layer, an asphalt self-adhesive layer II and a sand isolation layer; the upper surface of the asphalt self-adhesive layer I is covered with the magic tape layer and the lap edge isolation film I, and the lower surface of the asphalt self-adhesive layer II is covered with the sand isolation layer and the lap edge isolation film II. The materials of the asphalt self-adhesive layer I and the asphalt self-adhesive layer II are both polymer modified asphalt self-adhesive materials, and the polymer modified asphalt self-adhesive material includes the following raw materials in parts by weight: 45-55 parts of asphalt, 10-15 parts of polymer modifier, 5-10 parts of softening agent, 15-20 parts of filler, 4-6 parts of tackifier, 4-6 parts of stearic acid and 2-3 parts of dodecanedioic acid.

2. The polymer film-based self-adhesive waterproofing membrane with a magic tape structure according to claim 1, characterized in that, The polymer film base reinforcing layer is obtained by cross-lapping and hot pressing three layers of polyethylene films at an angle of 45°.

3. The polymer film-based self-adhering waterproofing membrane with a magic tape structure according to claim 2, characterized in that, The raw materials of the polyethylene film include the following components in parts by weight: 50-60 parts of high-density polyethylene, 40-60 parts of low-density polyethylene, 8-12 parts of ethylene-vinyl acetate copolymer and 10-14 parts of ethylene-acrylate copolymer.

4. The polymer film-based self-adhering waterproofing membrane with a magic tape structure according to claim 1, characterized in that, The polymer modifier includes one or more of SBS, SIS and polyethylene wax.

5. The polymer film-based self-adhesive waterproofing membrane with a magic tape structure according to claim 4, characterized in that, The polymer modifier is SBS.

6. The polymer film-based self-adhering waterproofing membrane with a magic tape structure according to claim 1, characterized in that, The filler includes one or more of talcum powder, titanium white and calcium carbonate.

7. The polymer film-based self-adhering waterproofing membrane with a magic tape structure according to claim 1, characterized in that, The tackifier includes one or more of C5 resin, C9 resin, terpene resin and rosin resin.

8. The polymer film-based self-adhering waterproofing membrane with a magic tape structure according to claim 1, characterized in that, The softening agent includes naphthenic oil.

9. A method for preparing a polymer film-based self-adhered waterproofing membrane with a magic tape structure, for preparing the polymer film-based self-adhered waterproofing membrane with a magic tape structure according to any one of claims 1 to 8, characterized in that, The method includes the following steps: S1, heating the asphalt to 140-150℃, and then mixing the remaining other components in the raw materials of the polymer modified asphalt self-adhesive material at 170-180℃ for 2-3h to obtain the polymer modified asphalt self-adhesive material; S2, covering the polymer modified asphalt self-adhesive material on the upper surface and the lower surface of the polymer film base reinforcing layer to form the asphalt self-adhesive layer I and the asphalt self-adhesive layer II; S3, covering the magic tape layer and the lap edge isolation film I on the upper surface of the asphalt self-adhesive layer I, and covering the sand isolation layer and the lap edge isolation film II on the lower surface of the asphalt self-adhesive layer II to obtain the self-adhesive waterproofing membrane with magic tape structure.

10. The method of claim 9, wherein the method further comprises the step of applying a pressure sensitive adhesive to the back surface of the polymer film. The mixing in step S1 is stirring at a shearing rate of 900-1000r / min.

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