Water-blocking tape material for optical cable with rapid water swelling performance and preparation method of water-blocking tape material

Abstract

The invention relates to the technical field of water-blocking tapes, in particular to a water-blocking tape material for an optical cable with rapid water swelling performance and a preparation method of the water-blocking tape material. The water-blocking tape material for the optical cable with the rapid water-absorbing expansion performance comprises a non-woven fabric layer, and a first water-absorbing expansion resin layer and a second water-absorbing expansion resin layer which are respectively adhered to two sides of the non-woven fabric layer, the first water-absorbing expansion resin layer and the second water-absorbing expansion resin layer are adhered to the two sides of the non-woven fabric layer through a water-based adhesive by adopting water-absorbing expansion resin powder; the water-based adhesive is prepared from the following raw materials in parts by mass: 10 to 25 parts of acrylic emulsion, 1 to 3 parts of polyurethane resin, 1 to 2 parts of sodium carboxymethyl cellulose, 1 to 3 parts of dispersing agent, 1 to 5 parts of crosslinked polystyrene microspheres, 5 to 15 parts of fumed silica and 1 to 5 parts of modified nano silicon dioxide.

Description

Technical Field

[0001] The present invention relates to the technical field of water-blocking tapes, and particularly to a water-blocking tape material for optical cables with fast water absorption and swelling performance and a preparation method thereof. Background Art

[0002] As a core component of the optical cable protection system, the optical cable water-blocking tape undertakes important functions of sealing water-blocking and moisture-proof buffering. The traditional water-blocking process mainly relies on the filling and blocking of grease-based water-blocking pastes, but such materials have problems such as large consumption of petroleum resources, heavy production pollution, and difficult construction and maintenance. With the development of superabsorbent resin technology, the current mainstream water-blocking tapes have turned to the structure of non-woven fabric composite with superabsorbent resin. However, significant technical bottlenecks have been found in engineering applications.

[0003] Existing water-blocking tapes mostly adopt a composite process of double-layer polyester fiber non-woven fabric sandwich bonded with superabsorbent resin. This structure exposes two key defects in practical applications: First, the physical barrier of the double-layer dense non-woven fabric makes it difficult for water molecules to quickly contact the superabsorbent resin in the middle layer, resulting in the water-blocking mechanism being activated only after a large amount of water has penetrated into the optical cable core, seriously affecting the protection timeliness; Second, the interfacial bonding force between the traditional adhesive system and the superabsorbent resin is insufficient, and resin particles are prone to fall off during use. Moreover, the adhesive layer has poor ductility and cannot meet the deformation requirements under dynamic stress, resulting in the failure of the water-blocking tape structure.

[0004] How to solve the problems of water absorption lag and insufficient mechanical properties of the water-blocking tape and break through the technical limitations of the single function of traditional water-blocking materials has become a technical problem to be solved at present. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to provide a water-blocking tape material for optical cables with fast water absorption and swelling performance and a preparation method thereof.

[0006] A water-blocking tape material for optical cables with fast water absorption and swelling performance includes: a non-woven fabric layer, and a first superabsorbent resin layer and a second superabsorbent resin layer respectively adhered to both sides of the non-woven fabric layer; the first superabsorbent resin layer and the second superabsorbent resin layer are both adhered to both sides of the non-woven fabric layer by using superabsorbent resin powder through a water-based adhesive.

[0007] Wherein, the raw materials of the water-based adhesive include, by mass: 10-25 parts of acrylic emulsion, 1-3 parts of polyurethane resin, 1-2 parts of sodium carboxymethyl cellulose, 1-3 parts of dispersant, 1-5 parts of cross-linked polystyrene microspheres, 5-15 parts of fumed silica, and 1-5 parts of modified nano-silica.

[0008] Preferably, the water-based adhesive is prepared by the following steps: adding a dispersant and cross-linked polystyrene microspheres into propylene glycol and stirring evenly, adding fumed silica thereto under stirring, adding modified nano-silica and stirring for 10 - 30 min, and adding acrylic emulsion, polyurethane resin, and sodium carboxymethylcellulose and stirring for 10 - 20 min.

[0009] Preferably, the particle size of the cross-linked polystyrene microspheres is 100 - 200 μm.

[0010] Preferably, the solid content of the acrylic emulsion is 42 - 48%.

[0011] Preferably, the modified nano-silica is nano-silica treated with γ-aminopropyltriethoxysilane.

[0012] Preferably, the water-absorbing and swelling resin powder is prepared by the following steps: adding acrylic acid into water, pre-neutralizing the pH value of the system to 5.5 - 6, adding nano-zinc oxide, N,N'-methylenebisacrylamide, and potassium persulfate thereto and stirring for 1 - 5 min, stirring at 70 - 85 °C for 1 - 2 h, cooling to below 40 °C, adding porous starch microspheres and continuing to stir for 10 - 20 min, granulating after crushing, sieving, drying with hot air, feeding into a fluidized bed and spraying an amino-silane ethanol solution on the particles, and treating at 110 - 120 °C for 10 - 20 min.

[0013] More preferably, the mass ratio of acrylic acid, nano-zinc oxide, N,N'-methylenebisacrylamide, potassium persulfate, and porous starch microspheres is 30 - 50:1 - 2:0.1 - 0.5:0.1 - 0.5:1 - 5.

[0014] More preferably, the mass fraction of the amino-silane ethanol solution is 4 - 6%.

[0015] The preparation method of the water-blocking tape material for optical cables with fast water-absorbing and swelling performance includes the following steps:

[0016] S1. Coating the water-based adhesive on both sides of the non-woven fabric by a roller coater, and then evenly spraying the water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0017] S2. Feeding into a high-temperature oven for heating and drying, preheating at 70 - 80 °C for 10 - 30 s, treating at 110 - 120 °C for 5 - 10 min, calendering and shaping into a roll.

[0018] Preferably, in S1, the single-side coating amount of the water-based adhesive is 35 ± 2 g / m 2 。

[0019] Beneficial effects:

[0020] The present invention uses non-woven fabric as the main carrier, and its three-dimensional fiber network structure forms a fiber-glue layer interpenetrating structure through double-sided coating with water-based adhesive; in the water-based adhesive, cross-linked polystyrene microspheres absorb stress through microsphere deformation and form a network structure with acrylic emulsion, while improving the toughness of the glue layer and maintaining modulus balance. With the rigid enhancement effect of modified nano-silica, the tensile strength is greatly enhanced.

[0021] The present invention uses amino-silane surface treatment to prepare water-absorbing and swelling resin powder, so that covalent bonds are formed through interfacial coupling between the particle surface and the water-based adhesive during baking. The porous starch microspheres establish a capillary penetration network through their three-dimensional through-pores, shortening the water contact time to less than 0.5 seconds. Combined with the chemical bonding formed by surface silane treatment, the structural stability of the water-absorbing resin is jointly ensured, and the elongation rate of the water-blocking tape is improved through synergistic action. Moreover, rapid capillary penetration can accelerate the migration of water molecules, significantly enhancing the water absorption rate.

[0022] After testing, the thickness of the water-blocking tape of the present invention is 0.5 - 1 mm, and the water absorption and swelling height can reach more than 20 mm in 3 minutes, improving the performance of the water-blocking material for the optical cable core, meeting the requirements of rapid water blocking. After the water-absorbing and swelling resin quickly contacts the water entering the optical cable core and swells, it blocks water, has the characteristics of strong water absorption performance and protecting the metal parts in the cable from being corroded by moisture, and better meets the water-blocking requirements of the optical cable. Description of the Drawings

[0023] Figure 1 It is a comparison chart of the swelling speed and swelling height of the water-blocking tapes obtained in Example 5 and Comparative Examples 1 - 3.

[0024] Figure 2 It is a comparison chart of the elongation rate and tensile strength of the water-blocking tapes obtained in Example 5 and Comparative Examples 1 - 3. Detailed Embodiments

[0025] The present invention will be further explained below with reference to specific embodiments.

[0026] The ammonium polyacrylate dispersant used below is purchased from Wuhan Mouqu New Materials Co., Ltd., and the brand is ROHMIHAAS OROTAN 1124.

[0027] The cross-linked polystyrene microspheres used below can refer to Reference [1] (Huang Guangcheng, Qiu Bite, Liu Yadong, Zhao Hui, Ji Shengxiang. Preparation of Porous Cross-linked Polystyrene Microspheres with Controllable Particle Size and Pore Size [J]. Chinese Journal of Applied Chemistry, 33(4): 406 - 411).

[0028] The modified nano-silica used below is prepared by the following steps: Disperse 1 g of nano-silica in 5 g of deionized water, and perform ultrasonic treatment for 45 min to obtain a nano-silica dispersion; Dissolve 0.02 g of γ-aminopropyltriethoxysilane in 5 g of an ethanol aqueous solution with a volume fraction of 90%, adjust the pH value to 4.5, stir at 50 - 60 °C for 90 min, then dropwise add the nano-silica dispersion thereto, perform ultrasonic treatment at 70 °C for 6 h, and dry.

[0029] Example 1

[0030] A water-blocking tape material for optical cables with rapid water absorption and swelling properties includes: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0031] The raw materials of the water-based adhesive include: 10 g of acrylic emulsion with a solid content of 42%, 1 g of polyurethane resin, 1 g of sodium carboxymethyl cellulose, 1 g of ammonium polyacrylate dispersant, 1 g of cross-linked polystyrene microspheres with a particle size of 100 - 200 μm, 5 g of fumed silica, and 1 g of modified nano-silica.

[0032] The water-based adhesive is prepared by the following steps: Add the ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 20 g of propylene glycol and stir evenly. While stirring, add fumed silica thereto, stir at a speed of 500 r / min for 1 h, add modified nano-silica and stir for 10 min, and then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 10 min.

[0033] The water-absorbing and swelling resin powder is prepared by the following steps: Add 30 g of acrylic acid to 40 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 with a 1 mol / L sodium hydroxide solution, add 1 g of nano-zinc oxide, 0.1 g of N,N'-methylenebisacrylamide, and 0.1 g of potassium persulfate thereto, stir at a speed of 1000 r / min for 1 min, stir at a temperature of 70 °C for 1 h, cool to below 40 °C, add 1 g of porous starch microspheres and continue to stir for 10 min, granulate after crushing, pass through a 100-mesh sieve, perform hot air drying, and spray a 4% γ-aminopropyltriethoxysilane ethanol solution on the particles in a fluidized bed for 15 min at a spraying rate of 1.5 mL / (min·kg), and treat at a temperature of 110 °C for 10 min.

[0034] The preparation method of the above-mentioned water-blocking tape material for optical cables with rapid water absorption and swelling properties includes the following steps:

[0035] S1. Apply water-based adhesive on both sides of the non-woven fabric using a roller coater. The single-sided coating amount of the water-based adhesive is 33 g / m 2 ; Subsequently, evenly sprinkle water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0036] S2. Feed it into a high-temperature oven for heating and drying. Preheat at a temperature of 70°C for 10 s, treat at a temperature of 110°C for 5 min, and then calender, shape, and wind it into a roll.

[0037] Example 2

[0038] A water-blocking tape material for optical cables with fast water-absorbing and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0039] The raw materials of the water-based adhesive include: 25 g of acrylic emulsion with a solid content of 48%, 3 g of polyurethane resin, 2 g of sodium carboxymethyl cellulose, 3 g of ammonium polyacrylate dispersant, 5 g of cross-linked polystyrene microspheres with a particle size of 100 - 200 μm, 15 g of fumed silica, and 5 g of modified nano-silica.

[0040] The water-based adhesive is prepared by the following steps: Add ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 40 g of propylene glycol and stir evenly. While stirring, add fumed silica to it, stir at a speed of 1000 r / min for 2 h, add modified nano-silica and stir for 30 min, then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 20 min.

[0041] The water-absorbing and swelling resin powder is prepared by the following steps: Add 50 g of acrylic acid to 60 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 using a sodium hydroxide solution with a concentration of 2 mol / L, add 2 g of nano-zinc oxide, 0.5 g of N,N'-methylenebisacrylamide, and 0.5 g of potassium persulfate to it, stir at a speed of 2000 r / min for 5 min, stir at a temperature of 85°C for 2 h, cool to below 40°C, add 5 g of porous starch microspheres and continue to stir for 20 min, crush and granulate, pass through a 200-mesh sieve, dry with hot air, feed it into a fluidized bed, spray a 6% by mass γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, with a spraying volume of 1.5 mL / (min·kg), and treat at a temperature of 120°C for 20 min.

[0042] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water-absorbing and swelling performance includes the following steps:

[0043] S1. Apply aqueous adhesive on both sides of the non-woven fabric using a roller coater. The single-sided coating amount of the aqueous adhesive is 37 g / m 2 ; Subsequently, sprinkle water-absorbing and swelling resin powder evenly on the surfaces of the aqueous adhesives on both sides of the non-woven fabric;

[0044] S2. Send it into a high-temperature oven for heating and drying. Preheat at a temperature of 80 °C for 30 s, treat at a temperature of 120 °C for 10 min, and then calender and shape it into a roll.

[0045] Example 3

[0046] A water-blocking tape material for optical cables with fast water-absorbing and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through an aqueous adhesive.

[0047] The raw materials of the aqueous adhesive include: 20 g of acrylic emulsion with a solid content of 44%, 1.5 g of polyurethane resin, 1.8 g of sodium carboxymethyl cellulose, 1.5 g of ammonium polyacrylate dispersant, 4 g of cross-linked polystyrene microspheres with a particle size of 100 - 200 μm, 8 g of fumed silica, and 4 g of modified nano-silica.

[0048] The aqueous adhesive is prepared by the following steps: Add ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 25 g of propylene glycol and stir evenly. While stirring, add fumed silica to it, stir at a speed of 900 r / min for 80 min, add modified nano-silica and stir for 25 min, then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 12 min.

[0049] The water-absorbing and swelling resin powder is prepared by the following steps: Add 45 g of acrylic acid to 45 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 using a sodium hydroxide solution with a concentration of 1.7 mol / L. Add 1.2 g of nano-zinc oxide, 0.4 g of N,N'-methylenebisacrylamide, and 0.2 g of potassium persulfate to it, stir at a speed of 1800 r / min for 2 min, stir at a temperature of 80 °C for 80 min, cool to below 40 °C, add 4 g of porous starch microspheres and continue to stir for 12 min. After crushing, granulate, pass through a 150-mesh sieve, dry with hot air, send it into a fluidized bed, spray a 5% by mass γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, the spraying amount is 1.5 mL / (min·kg), and treat at a temperature of 118 °C for 13 min.

[0050] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water-absorbing and swelling performance includes the following steps:

[0051] S1. Apply water-based adhesive on both sides of the non-woven fabric using a roller coater. The single-side coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0052] S2. Feed it into a high-temperature oven for heating and drying. Preheat at a temperature of 77 °C for 15 s, process at a temperature of 118 °C for 7 min, and then calender and shape it into a roll.

[0053] Example 4

[0054] A water-blocking tape material for optical cables with fast water-absorbing and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0055] The raw materials of the water-based adhesive include: 15 g of acrylic emulsion with a solid content of 46%, 2.5 g of polyurethane resin, 1.2 g of sodium carboxymethyl cellulose, 2.5 g of ammonium polyacrylate dispersant, 2 g of cross-linked polystyrene microspheres with a particle size of 100-200 μm, 12 g of fumed silica, and 2 g of modified nano-silica.

[0056] The water-based adhesive is prepared by the following steps: Add ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 35 g of propylene glycol and stir evenly. Under stirring, add fumed silica to it, stir at a speed of 700 r / min for 100 min, add modified nano-silica and stir for 15 min, and then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 18 min.

[0057] The water-absorbing and swelling resin powder is prepared by the following steps: Add 35 g of acrylic acid to 55 g of deionized water, pre-neutralize the pH value of the system to 5.5-6 using a sodium hydroxide solution with a concentration of 1.3 mol / L, add 1.8 g of nano-zinc oxide, 0.2 g of N,N'-methylenebisacrylamide, and 0.4 g of potassium persulfate to it, stir at a speed of 1200 r / min for 4 min, stir at a temperature of 75 °C for 100 min, cool to below 40 °C, add 2 g of porous starch microspheres and continue to stir for 18 min, crush and granulate, pass through a 150-mesh sieve, dry with hot air, feed it into a fluidized bed and spray a 5% by mass γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, with a spraying amount of 1.5 mL / (min·kg), and process at a temperature of 112 °C for 17 min.

[0058] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water-absorbing and swelling performance includes the following steps:

[0059] S1. Apply water-based adhesive on both sides of the non-woven fabric using a roller coater. The single-sided coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle water-absorbent swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0060] S2. Feed it into a high-temperature oven for heating and drying. Preheat at a temperature of 73 °C for 25 s, process at a temperature of 112 °C for 9 min, and then calender, shape and roll it up.

[0061] Example 5

[0062] A water-blocking tape material for optical cables with fast water-absorbent swelling performance, comprising: a non-woven fabric layer, and a first water-absorbent swelling resin layer and a second water-absorbent swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbent swelling resin layer and the second water-absorbent swelling resin layer are adhered to both sides of the non-woven fabric layer by water-absorbent swelling resin powder through a water-based adhesive.

[0063] The raw materials of the water-based adhesive include: 18 g of acrylic emulsion with a solid content of 45%, 2 g of polyurethane resin, 1.5 g of sodium carboxymethyl cellulose, 2 g of ammonium polyacrylate dispersant, 3 g of cross-linked polystyrene microspheres with a particle size of 100 - 200 μm, 10 g of fumed silica, and 3 g of modified nano-silica.

[0064] The water-based adhesive is prepared by the following steps: Add the ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 30 g of propylene glycol and stir evenly. While stirring, add fumed silica to it, stir at a speed of 800 r / min for 90 min, add modified nano-silica and stir for 20 min, then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 15 min.

[0065] The water-absorbent swelling resin powder is prepared by the following steps: Add 40 g of acrylic acid to 50 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 using a 1.5 mol / L sodium hydroxide solution, add 1.5 g of nano-zinc oxide, 0.3 g of N,N'-methylenebisacrylamide, and 0.3 g of potassium persulfate to it, stir at a speed of 1500 r / min for 3 min, stir at a temperature of 78 °C for 90 min, cool to below 40 °C, add 3 g of porous starch microspheres and continue to stir for 15 min, crush and granulate, pass through a 150-mesh sieve, dry with hot air, feed it into a fluidized bed and spray a 5% mass fraction of γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, with a spraying amount of 1.5 mL / (min·kg), and process at a temperature of 115 °C for 15 min.

[0066] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water-absorbent swelling performance includes the following steps:

[0067] S1. Apply water-based adhesive on both sides of the non-woven fabric using a roller coater. The single-sided coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0068] S2. Send it into a high-temperature oven for heating and drying. Preheat at 75°C for 20 s, process at 115°C for 8 min, and then calender and shape it into a roll.

[0069] Comparative Example 1

[0070] A water-blocking tape material for optical cables with fast water-absorbing and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0071] The raw materials of the water-based adhesive include: 18 g of acrylic emulsion with a solid content of 45%, 2 g of polyurethane resin, 1.5 g of sodium carboxymethyl cellulose, 2 g of ammonium polyacrylate dispersant, 3 g of cross-linked polystyrene microspheres with a particle size of 100 - 200 μm, 10 g of fumed silica, and 3 g of modified nano-silica.

[0072] The water-based adhesive is prepared by the following steps: Add ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 30 g of propylene glycol and stir evenly. While stirring, add fumed silica to it, stir at a speed of 800 r / min for 90 min, add modified nano-silica and stir for 20 min, then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 15 min.

[0073] The water-absorbing and swelling resin powder is prepared by the following steps: Add 40 g of acrylic acid to 50 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 using a 1.5 mol / L sodium hydroxide solution, add 1.5 g of nano-zinc oxide, 0.3 g of N,N'-methylenebisacrylamide, and 0.3 g of potassium persulfate to it, stir at a speed of 1500 r / min for 3 min, stir at 78°C for 90 min, cool to below 40°C, add 3 g of porous starch microspheres and continue to stir for 15 min, crush and granulate, pass through a 150-mesh sieve, and dry with hot air.

[0074] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water-absorbing and swelling performance includes the following steps:

[0075] S1. Apply water-based adhesive on both sides of the non-woven fabric using a roller coater. The single-sided coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0076] S2. Feed it into a high-temperature oven for heating and drying. Preheat it at 75°C for 20 s, process it at 115°C for 8 min, and then calender and shape it into a roll.

[0077] Comparative Example 2

[0078] A water-blocking tape material for optical cables with fast water absorption and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0079] The raw materials of the water-based adhesive include: 18 g of acrylic emulsion with a solid content of 45%, 2 g of polyurethane resin, 1.5 g of sodium carboxymethyl cellulose, 2 g of ammonium polyacrylate dispersant, 3 g of cross-linked polystyrene microspheres with a particle size of 100-200 μm, 10 g of fumed silica, and 3 g of modified nano-silica.

[0080] The water-based adhesive is prepared by the following steps: Add the ammonium polyacrylate dispersant and cross-linked polystyrene microspheres to 30 g of propylene glycol and stir evenly. While stirring, add fumed silica to it, stir at a speed of 800 r / min for 90 min, add modified nano-silica and stir for 20 min, and then add acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stir for 15 min.

[0081] The water-absorbing and swelling resin powder is prepared by the following steps: Add 40 g of acrylic acid to 50 g of deionized water, pre-neutralize the pH value of the system to 5.5-6 with a 1.5 mol / L sodium hydroxide solution, add 1.5 g of nano-zinc oxide, 0.3 g of N,N'-methylenebisacrylamide, and 0.3 g of potassium persulfate to it, stir at a speed of 1500 r / min for 3 min, stir at 78°C for 90 min, cool it below 40°C, add 3 g of corn starch and continue to stir for 15 min, granulate after crushing, pass through a 150-mesh sieve, dry it with hot air, feed it into a fluidized bed and spray a 5% by mass γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, with a spraying amount of 1.5 mL / (min·kg), and process it at 115°C for 15 min.

[0082] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water absorption and swelling performance includes the following steps:

[0083] S1. Use a roller coater to coat the water-based adhesive on both sides of the non-woven fabric, and the unilateral coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle the water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0084] S2. Feed it into a high-temperature oven for heating and drying. Preheat it at 75°C for 20 s, treat it at 115°C for 8 min, then calender and shape it into a roll.

[0085] Comparative Example 3

[0086] A water-blocking tape material for optical cables with fast water absorption and swelling performance, comprising: a non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive.

[0087] The raw materials of the water-based adhesive include: 18 g of acrylic emulsion with a solid content of 45%, 5 g of polyurethane resin, 1.5 g of sodium carboxymethylcellulose, 2 g of ammonium polyacrylate dispersant, 10 g of fumed silica, and 3 g of modified nano-silica.

[0088] The water-based adhesive is prepared by the following steps: Add the ammonium polyacrylate dispersant to 30 g of propylene glycol and stir evenly. Under stirring, add fumed silica to it, stir at a speed of 800 r / min for 90 min, add modified nano-silica and stir for 20 min, then add acrylic emulsion, polyurethane resin, and sodium carboxymethylcellulose and stir for 15 min.

[0089] The water-absorbing and swelling resin powder is prepared by the following steps: Add 40 g of acrylic acid to 50 g of deionized water, pre-neutralize the pH value of the system to 5.5 - 6 with a 1.5 mol / L sodium hydroxide solution, add 1.5 g of nano-zinc oxide, 0.3 g of N,N'-methylenebisacrylamide, and 0.3 g of potassium persulfate to it, stir at a speed of 1500 r / min for 3 min, stir at 78°C for 90 min, cool it below 40°C, add 3 g of porous starch microspheres and continue to stir for 15 min, break it up and granulate, pass through a 150-mesh sieve, dry it with hot air, feed it into a fluidized bed and spray a 5% mass fraction of γ-aminopropyltriethoxysilane ethanol solution on the particles for 15 min, with a spraying rate of 1.5 mL / (min·kg), and treat it at 115°C for 15 min.

[0090] The preparation method of the above-mentioned water-blocking tape material for optical cables with fast water absorption and swelling performance includes the following steps:

[0091] S1. Use a roller coater to coat the water-based adhesive on both sides of the non-woven fabric, and the single-sided coating amount of the water-based adhesive is 35 g / m 2 ; Subsequently, evenly sprinkle the water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric;

[0092] S2. Feed it into a high-temperature oven for heating and drying. Preheat it at 75°C for 20 s, process it at 115°C for 8 min, then calender and shape it into a roll.

[0093] Measure the thickness of the water-blocking tapes obtained in Example 5 and Comparative Examples 1-3. The thickness of all of them is 0.7 ± 0.2 mm.

[0094] Coat the water-blocking tapes obtained in Example 5 and Comparative Examples 1-3 on the outside of the copper conductor, and measure their swelling rate, swelling height, elongation at break, and tensile strength in seawater with reference to JB / T 10259-2014 "Water-blocking Tapes for Cables and Optical Cables".

[0095] As Figures 1 to 2 shown, the water-blocking tape obtained in Example 5 has the maximum swelling rate, swelling height, elongation at break, and tensile strength, which are better than those of Comparative Examples 1-3.

[0096] As mentioned above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A water-blocking tape material for optical cables with fast water absorption and swelling performance, characterized in that, Including: A non-woven fabric layer, and a first water-absorbing and swelling resin layer and a second water-absorbing and swelling resin layer respectively adhered to both sides of the non-woven fabric layer; Both the first water-absorbing and swelling resin layer and the second water-absorbing and swelling resin layer are adhered to both sides of the non-woven fabric layer by using water-absorbing and swelling resin powder through a water-based adhesive; The raw materials of the water-based adhesive include, by mass: 10-25 parts of acrylic emulsion, 1-3 parts of polyurethane resin, 1-2 parts of sodium carboxymethyl cellulose, 1-3 parts of dispersant, 1-5 parts of cross-linked polystyrene microspheres, 5-15 parts of fumed silica, and 1-5 parts of modified nano-silica.

2. The water-blocking tape material for optical cables with fast water absorption and swelling performance according to claim 1, characterized in that, The water-based adhesive is prepared by the following steps: adding the dispersant and cross-linked polystyrene microspheres into propylene glycol and stirring evenly, adding fumed silica thereto under stirring, adding the modified nano-silica and stirring for 10-30 min, and adding the acrylic emulsion, polyurethane resin, and sodium carboxymethyl cellulose and stirring for 10-20 min.

3. The water-blocking tape material for optical cables with fast water absorption and swelling performance according to claim 1, characterized in that, The particle size of the cross-linked polystyrene microspheres is 100-200 μm.

4. The water-blocking tape material for optical cables with rapid water absorption and swelling performance according to claim 1, characterized in that, The solid content of the acrylic emulsion is 42-48%.

5. The water-blocking tape material for optical cables with fast water absorption and swelling performance according to claim 1, characterized in that, The modified nano-silica is nano-silica treated with γ-aminopropyltriethoxysilane.

6. The water-blocking tape material for optical cables with rapid water absorption and swelling performance according to claim 1, characterized in that The water-absorbing and swelling resin powder is prepared by the following steps: adding acrylic acid into water, pre-neutralizing the pH value of the system to 5.5-6, adding nano-zinc oxide, N,N'-methylenebisacrylamide, and potassium persulfate thereto and stirring for 1-5 min, stirring at 70-85 °C for 1-2 h, cooling to below 40 °C, adding porous starch microspheres and continuing to stir for 10-20 min, crushing and granulating, sieving, drying with hot air, feeding into a fluidized bed, spraying an amino-silane ethanol solution on the particles, and treating at 110-120 °C for 10-20 min.

7. The water-blocking tape material for optical cables with rapid water absorption and swelling performance according to claim 6, characterized in that, The mass ratio of acrylic acid, nano-zinc oxide, N,N'-methylenebisacrylamide, potassium persulfate, and porous starch microspheres is 30-50:1-2:0.1-0.5:0.1-0.5:1-5.

8. The water-blocking tape material for optical cables with fast water absorption and swelling performance according to claim 6, characterized in that, The mass fraction of the amino-silane ethanol solution is 4-6%.

9. A method for preparing a water-blocking tape material for an optical cable having a fast water absorption and swelling performance as described in any one of claims 1-8, characterized in that, Including the following steps: S1. Coating the water-based adhesive on both sides of the non-woven fabric by using a roller coater, and then evenly spraying the water-absorbing and swelling resin powder on the surfaces of the water-based adhesives on both sides of the non-woven fabric; S2. Feeding into a high-temperature oven for heating and drying, preheating at 70-80 °C for 10-30 s, treating at 110-120 °C for 5-10 min, calendering and shaping into a roll.

10. The method for preparing a water-blocking tape material for an optical cable with fast water absorption and swelling performance according to claim 9, characterized in that, In S1, the single-sided coating amount of the water-based adhesive is 35 ± 2 g / m 2 .

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