Impermeable liner and its preparation method and rubber boots

Abstract

This invention relates to the field of manufacturing technology, and more particularly to an impermeable liner, its preparation method, and rubber boots. The preparation method of the impermeable liner includes the following steps: S1, pretreating the fabric with a treatment agent; S2, immersing the pretreated fabric in a liner slurry; S3, curing the impermeable fabric to obtain the impermeable liner. The impermeable liner is a continuous adhesive film formed by curing the fabric after it has been immersed in a liner slurry. This continuous adhesive film has the advantages of being tightly bonded to the fabric, impermeable, and non-delaminating. It completely prevents the rubber material on the rubber boot surface and sole from permeating through the impermeable liner, thus preventing allergic reactions in users due to adhesive permeation. It is both aesthetically pleasing and practical.

Description

Technical Field

[0001] This invention relates to the field of manufacturing technology, and in particular to impermeable linings, their preparation methods, and rubber boots. Background Technology

[0002] Currently, rubber boots, such as rubber-uppered mining boots, are produced using the traditional lamination process. This results in inconsistent product quality and a low pass rate, and it is difficult to trace the source of quality problems. Using molding or injection molding processes can significantly improve product quality and reduce the difficulty of operation for workers. The main technical challenge of manufacturing mining boots using molding or injection molding processes is that the rubber compound, in a viscous state, can seep through the lining and form a continuous or intermittent film on the inner surface of the boot. This film can easily cause allergic reactions upon contact with the human body and affect the overall appearance of the boot. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention provides a method for preparing an impermeable liner. The impermeable liner is a continuous adhesive film formed by immersing a fabric in an liner slurry and then curing it. The continuous adhesive film has the advantages of being tightly bonded to the fabric, impermeable to adhesive, and non-delaminating. It can completely prevent the rubber material of the rubber boot upper and rubber boot sole in a viscous state from passing through the impermeable liner, and will not cause allergies to users due to adhesive penetration. It is both aesthetically pleasing and practical.

[0004] In one aspect of the present invention, a method for preparing an impermeable liner is provided, the method comprising the following steps:

[0005] S1. Pre-treat the fabric using a treatment agent;

[0006] S2. Immerse the pretreated fabric in the lining slurry.

[0007] S3. The impregnated fabric is cured to obtain an impermeable lining.

[0008] Furthermore, the preprocessing includes:

[0009] S11. Dissolve the perfluoroalkyl acrylate treatment agent in water to obtain the fabric treatment agent;

[0010] S12. Place the fabric on the aluminum mold and preheat it in the air duct. Spray the fabric treatment agent onto the fabric at a pressure of 1.5-3.5MPa. After vertical dripping for 20-100s, perform heat treatment at 60-120℃ for 10-30min.

[0011] Furthermore, the lining slurry comprises the following raw materials in parts by weight:

[0012] 30-80 parts polyvinyl chloride, 25-50 parts dioctyl terephthalate, 10-20 parts calcium-zinc composite stabilizer, 0.5-1.5 parts lubricant, 10-20 parts calcium carbonate reinforcing agent, and 0.5-2.5 parts tetramethylethylenediamine polarity modifier; or,

[0013] 30-70 parts polyisoprene latex, 2-4 parts vulcanizing agent, 0.2-0.8 parts accelerator CZ, 0.1-0.4 parts accelerator D, 0.5-1.0 parts accelerator DM, 0.2-0.7 parts scorch inhibitor CTP, 2-5 parts zinc oxide, 0.7-1.5 parts stearic acid, 0.5-1.5 parts antioxidant AH, and 0.1-0.5 parts tetrahydrofuran polarity modifier; or,

[0014] Natural latex 30-70 parts, vulcanizing agent 2-4 parts, accelerator TMTD 0.2-0.8 parts, foaming agent AC 10-15 parts, scorch inhibitor CTP 0.1-0.4 parts, reinforcing agent calcium carbonate 20-30 parts, antioxidant RD 0.3-0.8 parts, polarity modifier tetrahydrofuran 0.1-0.5 parts; or,

[0015] Polyethylene 30-80 parts, calcium-zinc composite stabilizer 10-20 parts, lubricant 0.5-1.0 parts, dioctyl phthalate 40-60 parts, calcium carbonate 10-20 parts, polarity modifier tetramethylethylenediamine 0.5-2.5 parts; or,

[0016] Polypropylene 30-80 parts, calcium-zinc composite stabilizer 10-20 parts, lubricant 0.5-1.0 parts, dioctyl terephthalate 50-60 parts, calcium carbonate 10-20 parts, polarity modifier tetramethylethylenediamine 0.5-2.5 parts; or,

[0017] 30-70 parts nitrile latex, 2-3 parts vulcanizing agent DCP, 0.2-0.6 parts accelerator CZ, 0.5-1.2 parts accelerator TMTD, 0.2-0.7 parts scorch inhibitor CTP, 0.5-1.0 parts stearic acid, 2-5 parts zinc oxide, 0.5-1.0 parts antioxidant RD, 20-50 parts reinforcing agent, and 0.5-2.5 parts polarity modifier tetramethylethylenediamine; or,

[0018] 30-70 parts of chloroprene latex, 0.2-0.6 parts of accelerator NA-22, 0.5-1.2 parts of accelerator TMTD, 0.2-0.7 parts of scorch inhibitor CTP, 2-5 parts of zinc oxide, 2-5 parts of magnesium oxide, 0.5-1.0 parts of antioxidant RD, 20-50 parts of reinforcing agent, and 0.5-2.5 parts of polarity modifier tetramethylethylenediamine.

[0019] Furthermore, the method for preparing the lining slurry includes the following steps:

[0020] The raw materials for forming the lining slurry are added at a speed of 150-300 r / min. During the addition process, the temperature is controlled not to exceed 30°C. After all the materials are added, the mixture is stirred at a speed of 80-200 r / min until the slurry temperature reaches 40-55°C, and then the lining slurry is obtained.

[0021] Further, the impregnation includes: immersing the pretreated fabric cover and the aluminum mold together in the lining slurry, leaving 2-3 cm at the upper edge of the pretreated fabric, and immersing the rest in the lining slurry for 3-15 minutes.

[0022] Further, step S3 includes: rotating the aluminum mold and the impregnated fabric evenly for 1-3 weeks, letting it stand and drip for 1-5 minutes, repeating 1-4 times, inverting it and sending it into an oven, curing at a temperature of 120-180℃ for 10-30 minutes, removing the fabric and cooling it to room temperature, demolding it, and finishing it to obtain the impermeable lining.

[0023] In another aspect of the invention, the invention provides an impermeable liner prepared by the aforementioned method for preparing an impermeable liner.

[0024] In another aspect of the invention, a rubber boot is provided, the rubber boot comprising:

[0025] The rubber boot upper, wherein the raw materials forming the rubber boot upper include a polarity modifier;

[0026] A rubber boot sole, wherein the raw material forming the rubber boot sole includes a polarity modifier, and the lower edge of the rubber boot upper is connected to the edges around the rubber boot sole;

[0027] The aforementioned impermeable liner is placed within the space defined by the rubber boot upper and the rubber boot sole, with the cylindrical outer surface of the impermeable liner connected to the rubber boot upper and the bottom surface of the impermeable liner connected to the rubber boot sole.

[0028] In another aspect, the present invention provides a method for preparing a rubber boot as described above, the method comprising the following steps:

[0029] Add the rubber compound to the injection molding machine hopper, with the hopper temperature at 15~45℃, and keep the rubber compound in the hopper for 2 minutes;

[0030] The aforementioned impermeable liner is fitted onto the rubber injection molding machine mold. The mold is closed to ensure that the temperature of the impermeable liner matches the temperature of the mold. After the mold is opened, a cap and an anti-puncture pad are added. After the mold is closed, the rubber material is used for one-time injection molding.

[0031] Furthermore, the injection speed is 5-50 mL / s, the injection pressure is 50-300 MPa, and after the rubber compound is injected, it enters the vulcanization stage. The vulcanization molding temperature is 140-160℃, the vulcanization molding time is 300s-720s, the mold is opened after vulcanization molding, and the finished product is obtained after demolding.

[0032] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0033] The impermeable lining of this invention is a continuous adhesive film formed by immersing and curing fabric in an lining slurry. This continuous adhesive film has the advantages of tight adhesion to the fabric, impermeability, and no delamination. It completely prevents the rubber material of the rubber upper and sole in a viscous state from permeating through the impermeable lining, thus preventing allergic reactions caused by permeation. It is both aesthetically pleasing and practical. During use, the seams of the impermeable lining remain tightly sealed, preventing further permeation. When applied to rubber boots, the rubber upper and the impermeable lining are tightly bonded and seamlessly integrated, resulting in better softness and elasticity, and greater comfort.

[0034] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention are described clearly and completely. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. The following embodiments are used to illustrate this invention but should not be used to limit the scope of this invention.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0038] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] In one aspect of the present invention, a method for preparing an impermeable lining is provided, the method comprising the following steps: S1, pretreating the fabric with a treatment agent; S2, immersing the pretreated fabric in an lining slurry; S3, curing the impermeable fabric to obtain an impermeable lining.

[0041] The impermeable lining of this invention is a continuous adhesive film formed by immersing and curing fabric in an lining slurry. This continuous adhesive film has the advantages of tight adhesion to the fabric, impermeability, and no delamination. It completely prevents the rubber material of the rubber upper and sole in a viscous state from permeating through the impermeable lining, thus preventing allergic reactions caused by permeation. It is both aesthetically pleasing and practical. During use, the seams of the impermeable lining remain tightly sealed, preventing further permeation. When applied to rubber boots, the rubber upper and the impermeable lining are tightly bonded and seamlessly integrated, resulting in better softness and elasticity, and greater comfort.

[0042] In some embodiments of the present invention, the pretreatment includes: S11, dissolving a perfluoroalkyl acrylate treatment agent in water to obtain a fabric treatment agent; S12, placing the fabric on an aluminum mold and preheating it in an air duct, spraying the fabric treatment agent onto the fabric at a pressure of 1.5-3.5 MPa, vertically dripping for 20-100 seconds, and then performing heat treatment at 60-120°C for 10-30 minutes.

[0043] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-80 parts of polyvinyl chloride, 25-50 parts of dioctyl terephthalate, 10-20 parts of calcium-zinc composite stabilizer (e.g., the trade name of calcium-zinc composite stabilizer may be SAK-CZL57-NP), 0.5-1.5 parts of lubricant, 10-20 parts of reinforcing agent calcium carbonate, and 0.5-2.5 parts of polarity modifier tetramethylethylenediamine.

[0044] In some embodiments of the present invention, the lubricant includes, but is not limited to, at least one of epoxidized soybean oil, microcrystalline wax, white oil, and polyethylene wax.

[0045] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-70 parts of polyisoprene latex, 2-4 parts of vulcanizing agent (vulcanizing agent including but not limited to sulfur), 0.2-0.8 parts of accelerator CZ (N-cyclohexyl-2-benzodiazolium sulfenamide), 0.1-0.4 parts of accelerator D (diphenylguanidine), 0.5-1.0 parts of accelerator DM (2,2'-dithiodibenzothiazole), 0.2-0.7 parts of scorch inhibitor CTP (N-cyclohexylthiophthalimide), 2-5 parts of zinc oxide, 0.7-1.5 parts of stearic acid, 0.5-1.5 parts of antioxidant AH (butanol-α-naphthylamine), and 0.1-0.5 parts of polarity modifier tetrahydrofuran.

[0046] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-70 parts of natural latex, 2-4 parts of vulcanizing agent (vulcanizing agent may include, but is not limited to, 4,4′-dithiodimorpholine), 0.2-0.8 parts of accelerator TMTD (tetramethylthiuram disulfide), 10-15 parts of foaming agent AC (azodicarbonamide), 0.1-0.4 parts of anti-scorching agent CTP, 20-30 parts of reinforcing agent calcium carbonate, 0.3-0.8 parts of antioxidant RD (2,2,4-trimethyl-1,2-dihydrophosphoric acid polymer), and 0.1-0.5 parts of polarity modifier tetrahydrofuran.

[0047] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-80 parts of polyethylene, 10-20 parts of calcium-zinc composite stabilizer (e.g., the trade name of calcium-zinc composite stabilizer may be SAK-CZL57-NP), 0.5-1.0 parts of lubricant, 40-60 parts of dioctyl phthalate, 10-20 parts of calcium carbonate, and 0.5-2.5 parts of tetramethylethylenediamine, a polarity modifier.

[0048] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-80 parts of polypropylene, 10-20 parts of calcium-zinc composite stabilizer (e.g., the trade name of calcium-zinc composite stabilizer may be SAK-CZL57-NP), 0.5-1.0 parts of lubricant, 50-60 parts of dioctyl terephthalate, 10-20 parts of calcium carbonate, and 0.5-2.5 parts of tetramethylethylenediamine, a polarity modifier.

[0049] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-70 parts of nitrile latex, 2-3 parts of vulcanizing agent DCP, 0.2-0.6 parts of accelerator CZ, 0.5-1.2 parts of accelerator TMTD, 0.2-0.7 parts of anti-scorching agent CTP, 0.5-1.0 parts of stearic acid, 2-5 parts of zinc oxide, 0.5-1.0 parts of antioxidant RD, 20-50 parts of reinforcing agent (including but not limited to kaolin), and 0.5-2.5 parts of polarity modifier tetramethylethylenediamine.

[0050] In some embodiments of the present invention, the lining slurry comprises the following raw materials in parts by weight: 30-70 parts of chloroprene latex, 0.2-0.6 parts of accelerator NA-22 (ethylene thiourea), 0.5-1.2 parts of accelerator TMTD, 0.2-0.7 parts of anti-scorching agent DM, 2-5 parts of zinc oxide, 2-5 parts of magnesium oxide, 0.5-1.0 parts of antioxidant RD, 20-50 parts of reinforcing agent (including but not limited to silicon dioxide), and 0.5-2.5 parts of polarity modifier tetramethylethylenediamine.

[0051] In some embodiments of the present invention, the preparation method of the lining slurry includes the following steps: adding the raw materials for forming the lining slurry at a rotation speed of 150-300 r / min, controlling the temperature not to exceed 30°C during the addition process, and stirring at a rotation speed of 80-200 r / min until the slurry temperature reaches 40-55°C to obtain the lining slurry.

[0052] In some embodiments of the present invention, the impregnation includes: immersing the pretreated fabric cover and the aluminum mold together in the lining slurry, leaving 2-3 cm at the upper edge of the pretreated fabric and immersing the rest entirely in the lining slurry, with an impregnation time of 3-15 minutes.

[0053] In some embodiments of the present invention, step S3 includes: rotating the aluminum mold and the impregnated fabric uniformly for 1-3 weeks, allowing the dripping agent to stand for 1-5 minutes, repeating 1-4 times, inverting it and sending it into an oven, curing at a temperature of 120-180℃ for 10-30 minutes, removing the fabric and cooling it to room temperature, demolding it, and finishing it to obtain the impermeable lining.

[0054] In some specific embodiments of the present invention, the method for preparing the impermeable liner includes the following steps:

[0055] (1) Preparation of lining slurry: Prepare polymer slurry according to the formula, stir at a certain speed during the feeding process, control the temperature not to exceed 30℃, and after all the materials are added, stir at a certain speed until the slurry temperature reaches 40-55℃ and then stop to obtain lining slurry;

[0056] (2) Preparation of rubber boot lining fabric: According to the lining sample, use a programmable knitting machine to make 12-32 count seamless lining fabric with cotton content of 35%-65%.

[0057] (3) Surface treatment of inner lining fabric: Add a certain amount of perfluoroalkyl acrylate treatment agent to appropriate deionized water, put the inner lining fabric on the aluminum mold and place it in the air duct for preheating, use a pressure water pump to evenly spray the prepared fabric treatment agent onto the inner lining fabric at a pressure of 1.5-3.5MPa, drip vertically for 20s-100s, and then perform heat treatment at different temperatures for 10min-30min.

[0058] (4) Preparation of impermeable lining: After the heat-treated lining fabric is cooled to room temperature, it is singed with a flame. Then, the lining fabric on the aluminum mold is immersed in the prepared lining slurry together with the aluminum mold. The immersion depth depends on the height of the lining. Leave 2-3 cm at the top edge and immerse the rest completely. The immersion time is 3-15 min. After immersion, take it out and rotate the aluminum mold and the lining fabric evenly for 1-3 weeks. Let it stand and drip slurry for 1-5 min. Repeat 1-4 times. After inverting, put it into a high temperature oven. The curing temperature is 120-180℃ and the curing time is 10-30 min. After taking it out, cool it to room temperature, demold it, and finish it to obtain the impermeable lining.

[0059] In another aspect of the present invention, the present invention provides an impermeable liner, which is prepared using the impermeable liner preparation method described above.

[0060] In another aspect of the invention, a rubber boot is provided, comprising: a rubber upper, wherein the raw material forming the rubber upper includes a polarity modifier; a rubber sole, wherein the raw material forming the rubber sole includes a polarity modifier, and the lower edge of the rubber upper is connected to the periphery of the rubber sole; and the aforementioned impermeable liner, wherein the impermeable liner is disposed within the space defined by the rubber upper and the rubber sole, and the cylindrical outer surface of the impermeable liner is connected to the rubber upper, and the bottom surface of the impermeable liner is connected to the rubber sole. Thus, the addition of a polarity modifier to the formulations of the rubber upper and rubber sole improves the compatibility of the impermeable liner with the rubber upper and rubber sole.

[0061] In some embodiments of the present invention, the rubber boot also includes a shockproof toe cap and a puncture-resistant pad, which are conventional features in the art and will not be described in detail here.

[0062] In some specific embodiments of the present invention, the boot upper is composed of the following raw materials in parts by weight: 30-70 parts natural rubber, 30-70 parts synthetic rubber, 2-4 parts vulcanizing agent, 0.2-0.8 parts accelerator CZ, 0.1-0.4 parts accelerator D, 0.5-1.0 parts accelerator DM, 0.1-0.4 parts scorch inhibitor CTP, 2-5 parts zinc oxide, 0.5-1.0 parts stearic acid, 15-30 parts reinforcing agent, 40-70 parts calcium carbonate, 0.3-0.8 parts antioxidant RD, 0.4-1.0 parts antioxidant AH, and 0.1-2.5 parts polarity modifier. The synthetic rubber is styrene-butadiene rubber or cis-butadiene rubber.

[0063] In some specific embodiments of the present invention, the boot sole is composed of the following raw materials in parts by weight: 30-70 parts natural rubber, 30-70 parts synthetic rubber, 2-4 parts vulcanizing agent, 0.2-0.8 parts accelerator CZ, 0.1-0.4 parts accelerator D, 0.5-1.0 parts accelerator DM, 0.1-0.4 parts scorch inhibitor CTP, 2-5 parts zinc oxide, 0.5-1.0 parts stearic acid, 40-80 parts reinforcing agent, 0.3-0.8 parts antioxidant RD, 0.4-1.0 parts antioxidant AH, and 0.1-2.5 parts polarity modifier. The synthetic rubber is styrene-butadiene rubber or cis-butadiene rubber.

[0064] In another aspect, the present invention provides a method for preparing rubber boots as described above. This method includes the following steps: continuously adding rubber material to the injection molding machine hopper at a temperature of 15-45°C, maintaining the rubber material in the hopper for 2 minutes; fitting the aforementioned impermeable liner onto the rubber injection molding machine mold, closing the mold to ensure the temperature of the impermeable liner matches the mold temperature; after opening the mold, adding a toe cap and puncture-resistant pad; and finally, after closing the mold, using the rubber material for one-time injection molding. Therefore, rubber boots produced using this molding process have stable quality, a high pass rate, a significantly shortened process flow, improved working conditions for workers, and reduced labor intensity.

[0065] In some preferred embodiments of the present invention, the mold used to prepare the rubber boots is exactly the same size as the aluminum mold used in the impregnation step when preparing the impregnable liner.

[0066] In some embodiments of the present invention, the injection speed is 5-50 mL / s, the injection pressure is 50-300 MPa, the rubber compound enters the vulcanization stage after injection, the vulcanization molding temperature is 140-160℃, the vulcanization molding time is 300s-720s, the mold is opened after vulcanization molding, and the finished product is obtained after demolding.

[0067] In some specific embodiments of the present invention, the method for preparing the rubber boot upper includes the following steps:

[0068] (1) Plasticizing: Put the cut natural rubber into a mixer for plasticizing. After plasticizing for min, discharge the rubber to obtain plasticized rubber.

[0069] (2) Ingredients: According to the formula requirements, use a balance to accurately weigh each ingredient and set aside.

[0070] (3) Mixing: Accurately weighed plasticized rubber, synthetic rubber and masterbatch are put into the internal mixer and pressed. Other raw materials except vulcanizing agent and accelerator are added. The pressure is slowly reduced and the load is lifted before pressing. The rubber is discharged and the discharged rubber is cooled in the open mill in time. After passing through the mill twice, the rubber is filtered. The filtered rubber is cooled in the open mill in time and passed through the mill. When the temperature of the rubber drops to below 105℃, the accurately weighed vulcanizing agent and accelerator are added and cooled to obtain the boot upper compound.

[0071] (4) Sheeting: Heat the rubber compound on a two-roll mill until it is uniformly heated and sheeted. The sheet thickness is 5-10mm.

[0072] In some specific embodiments of the present invention, the method for preparing a rubber boot sole includes the following steps:

[0073] (1) Plasticizing: Put the cut natural rubber into a mixer for plasticizing. After plasticizing for min, discharge the rubber to obtain plasticized rubber.

[0074] (2) Ingredients: According to the formula requirements, use a balance to accurately weigh each ingredient and set aside.

[0075] (3) Mixing: Add the accurately weighed plasticized rubber and synthetic rubber to the internal mixer, press and add other raw materials except vulcanizing agent and accelerator, slowly press down, press and discharge the rubber, and cool the discharged rubber in the open mill in time. After passing through the mill twice, start filtering the rubber. Cool the filtered rubber in the open mill in time, pass through the mill twice, and when the temperature of the rubber drops to below 105℃, add the accurately weighed vulcanizing agent and accelerator, cool, and you will get the boot sole compound.

[0076] (4) Sheeting: Heat the rubber compound on a two-roll mill until it is uniformly heated and sheeted. The sheet thickness is 5-20mm.

[0077] The present invention will be further described below with reference to specific embodiments. It should be noted that the following embodiments are only used to explain the present invention and should not be construed as limiting the present invention.

[0078] Example

[0079] Example 1

[0080] The method for preparing an impermeable liner includes the following steps:

[0081] (1) Preparation of lining slurry: Prepare polymer slurry according to the formula, stir at a certain speed during the feeding process, control the temperature not to exceed 30℃, and after all the materials are added, stir at a certain speed until the slurry temperature reaches 45℃ and then stop to obtain lining slurry;

[0082] (2) Preparation of rubber boot lining fabric: Based on the lining pattern, use a programmable knitting machine to produce a seamless lining fabric with a cotton content of 50% and a count of 12-32.

[0083] (3) Surface treatment of inner lining fabric: Add a certain amount of perfluoroalkyl acrylate treatment agent to appropriate deionized water, put the inner lining fabric on the aluminum mold and place it in the air duct for preheating, use a pressure water pump to spray the prepared fabric treatment agent evenly on the inner lining fabric at a pressure of 2.5MPa, after vertical dripping for 80s, perform heat treatment at different temperatures for 20min.

[0084] (4) Preparation of impermeable lining: After the heat-treated lining fabric is cooled to room temperature, it is singed with a flame. Then, the lining fabric on the aluminum mold and the aluminum mold are immersed in the prepared lining slurry. The immersion depth is based on the height of the lining, leaving 3 cm at the top edge and immersing the rest completely. The immersion time is 10 min. After immersion, the aluminum mold and the lining fabric are rotated evenly for 3 weeks. The slurry is allowed to drip for 5 min. This is repeated 4 times. After inverting, the lining is placed in a high-temperature oven. The curing temperature is 150℃ and the curing time is 20 min. After removal, the lining is cooled to room temperature, demolded, and finished to obtain the impermeable lining.

[0085] The lining slurry comprises the following raw materials in parts by weight:

[0086] 50 parts polyvinyl chloride, 40 parts dioctyl terephthalate, 15 parts calcium-zinc composite stabilizer (trade number SAK-CZL57-NP), 1 part microcrystalline wax lubricant, 15 parts calcium carbonate reinforcing agent, and 1.5 parts tetramethylethylenediamine polarity modifier.

[0087] Example 2

[0088] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 50 parts of polyisoprene latex, 3 parts of sulfur vulcanizing agent, 0.5 parts of accelerator CZ, 0.2 parts of accelerator D, 0.8 parts of accelerator DM, 0.5 parts of anti-scorching agent CTP, 3 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant AH, and 0.3 parts of polarity modifier tetrahydrofuran.

[0089] Example 3

[0090] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 50 parts of natural rubber latex, 3 parts of vulcanizing agent 4,4′-dithiodimorpholine, 0.5 parts of accelerator TMTD, 12 parts of foaming agent AC, 0.2 parts of anti-scorching agent CTP, 25 parts of reinforcing agent calcium carbonate, 0.5 parts of antioxidant RD, and 0.2 parts of polarity modifier tetrahydrofuran.

[0091] Example 4

[0092] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 30 parts of polyethylene, 10 parts of calcium-zinc composite stabilizer (trade number SAK-CZL57-NP), 0.5 parts of lubricant white oil, 40 parts of dioctyl phthalate, 10 parts of calcium carbonate, and 0.5 parts of polarity modifier tetramethylethylenediamine.

[0093] Example 5

[0094] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 80 parts of polypropylene, 10 parts of calcium-zinc composite stabilizer (trade number SAK-CZL57-NP), 1.0 part of lubricant polyethylene wax, 50 parts of dioctyl terephthalate, 10 parts of calcium carbonate, and 2.5 parts of polarity modifier tetramethylethylenediamine.

[0095] Example 6

[0096] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 70 parts of nitrile latex, 3 parts of vulcanizing agent DCP (diisopropylbenzene peroxide), 0.2 parts of accelerator CZ, 0.5 parts of accelerator TMTD, 0.7 parts of anti-scorching agent CTP, 1.0 part of stearic acid, 2 parts of zinc oxide, 1.0 part of antioxidant RD, 50 parts of reinforcing agent kaolin, and 0.5 parts of polarity modifier tetramethylethylenediamine.

[0097] Example 7

[0098] The preparation method of the impermeable liner is basically the same as in Example 1, except that the liner slurry includes the following raw materials in parts by weight: 70 parts of chloroprene latex, 0.6 parts of accelerator NA-22, 1.2 parts of accelerator TMTD, 0.7 parts of anti-scorching agent DM, 5 parts of zinc oxide, 5 parts of magnesium oxide, 1.0 part of antioxidant RD, 50 parts of reinforcing agent silica, and 2.5 parts of polarity modifier tetramethylethylenediamine.

[0099] Comparative Example 1

[0100] The preparation method of the lining includes: coating a layer of vulcanized film onto a 12-32 count seamless fabric with a cotton content of 50%.

[0101] Test method for leak-proof performance of impermeable lining

[0102] Seal the top of the impermeable liner or other cylindrical liner with a rubber ring with an air inlet, inject compressed air, immerse the impermeable liner in a water tank to the edge and apply a continuous internal pressure of (10±1) kPa for 30 seconds. During the test, observe the impermeable liner and determine whether continuous bubbles are generated to indicate whether there is a leak.

[0103] The linings of Examples 1-7 and Comparative Example 1 were subjected to leak-proof tests, and the experimental results are shown in Table 1 below:

[0104] Table 1

[0105]

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rubber boot, characterized in that, include: The rubber boot upper, wherein the raw materials forming the rubber boot upper include a polarity modifier; A rubber boot sole, wherein the raw material forming the rubber boot sole includes a polarity modifier, and the lower edge of the rubber boot upper is connected to the edges around the perimeter of the rubber boot sole; An impermeable liner is placed within the space defined by the rubber boot upper and the rubber boot sole, and the cylindrical outer surface of the impermeable liner is connected to the rubber boot upper, and the bottom surface of the impermeable liner is connected to the rubber boot sole. The method for preparing the impermeable liner includes the following steps: S1. Pre-treat the fabric using a treatment agent; The preprocessing includes: S11. Dissolve the perfluoroalkyl acrylate treatment agent in water to obtain the fabric treatment agent; S12. Place the fabric on the aluminum mold and preheat it in the air duct. Spray the fabric treatment agent onto the fabric under a pressure of 1.5-3.5MPa. After vertical dripping for 20-100s, perform heat treatment at 60-120℃ for 10-30min. S2. Immerse the pretreated fabric in the lining slurry. The lining slurry comprises the following raw materials in parts by weight: 30-80 parts polyvinyl chloride, 25-50 parts dioctyl terephthalate, 10-20 parts calcium-zinc composite stabilizer, 0.5-1.5 parts lubricant, 10-20 parts calcium carbonate reinforcing agent, and 0.5-2.5 parts tetramethylethylenediamine polarity modifier; or, 30-70 parts polyisoprene latex, 2-4 parts vulcanizing agent, 0.2-0.8 parts accelerator CZ, 0.1-0.4 parts accelerator D, 0.5-1.0 parts accelerator DM, 0.2-0.7 parts scorch inhibitor CTP, 2-5 parts zinc oxide, 0.7-1.5 parts stearic acid, 0.5-1.5 parts antioxidant AH, and 0.1-0.5 parts tetrahydrofuran polarity modifier; or, Natural latex 30-70 parts, vulcanizing agent 2-4 parts, accelerator TMTD 0.2-0.8 parts, foaming agent AC 10-15 parts, scorch inhibitor CTP 0.1-0.4 parts, reinforcing agent calcium carbonate 20-30 parts, antioxidant RD 0.3-0.8 parts, polarity modifier tetrahydrofuran 0.1-0.5 parts; or, Polyethylene 30-80 parts, calcium-zinc composite stabilizer 10-20 parts, lubricant 0.5-1.0 parts, dioctyl phthalate 40-60 parts, calcium carbonate 10-20 parts, polarity modifier tetramethylethylenediamine 0.5-2.5 parts; or, Polypropylene 30-80 parts, calcium-zinc composite stabilizer 10-20 parts, lubricant 0.5-1.0 parts, dioctyl terephthalate 50-60 parts, calcium carbonate 10-20 parts, polarity modifier tetramethylethylenediamine 0.5-2.5 parts; or, 30-70 parts nitrile latex, 2-3 parts vulcanizing agent DCP, 0.2-0.6 parts accelerator CZ, 0.5-1.2 parts accelerator TMTD, 0.2-0.7 parts scorch inhibitor CTP, 0.5-1.0 parts stearic acid, 2-5 parts zinc oxide, 0.5-1.0 parts antioxidant RD, 20-50 parts reinforcing agent, and 0.5-2.5 parts polarity modifier tetramethylethylenediamine; or, 30-70 parts of chloroprene latex, 0.2-0.6 parts of accelerator NA-22, 0.5-1.2 parts of accelerator TMTD, 0.2-0.7 parts of scorch inhibitor DM, 2-5 parts of zinc oxide, 2-5 parts of magnesium oxide, 0.5-1.0 parts of antioxidant RD, 20-50 parts of reinforcing agent, and 0.5-2.5 parts of polarity modifier tetramethylethylenediamine; S3. The impregnated fabric is cured to obtain an impermeable lining.

2. The rubber boot according to claim 1, characterized in that, The method for preparing the lining slurry includes the following steps: The raw materials for forming the lining slurry are added at a speed of 150-300 r / min. During the addition process, the temperature is controlled not to exceed 30°C. After all the materials are added, the mixture is stirred at a speed of 80-200 r / min until the slurry temperature reaches 40-55°C, and then the lining slurry is obtained.

3. The rubber boot according to claim 1, characterized in that, The impregnation includes: The pretreated fabric cover and aluminum mold are immersed together in the lining slurry. The upper edge of the pretreated fabric is left 2-3 cm, and the rest is completely immersed in the lining slurry. The immersion time is 3-15 minutes.

4. The rubber boot according to claim 1, characterized in that, Step S3 includes: Rotate the aluminum mold and the impregnated fabric evenly for 1-3 weeks, let it stand and drip for 1-5 minutes, repeat 1-4 times, invert it and put it into the oven, the curing temperature is 120-180℃, the curing time is 10-30 minutes, after the fabric is taken out and cooled to room temperature, demolded and finished, to obtain the impermeable lining.

5. A method for preparing a rubber boot as described in claim 1, characterized in that, Includes the following steps: Add the rubber compound to the injection molding machine hopper, with the hopper temperature at 15~45℃, and keep the rubber compound in the hopper for 2 minutes; The impermeable liner is fitted onto the rubber injection molding machine mold. The mold is closed to ensure that the temperature of the impermeable liner is the same as the temperature of the mold. After the mold is opened, a cap and an anti-puncture pad are added. After the mold is closed, the rubber material is used for one-time injection molding.

6. The method for preparing rubber boots according to claim 5, characterized in that, The injection speed of the single injection molding is 5-50 mL / s, the injection pressure is 50-300 MPa, after the rubber material is injected, it enters the vulcanization stage, the vulcanization molding temperature is 140-160℃, the vulcanization molding time is 300s-720s, after vulcanization molding, the mold is opened, and after demolding, the finished product is obtained.

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