Inflatable pasting plate sleeve with anti-collision end face and anti-cutting surface and preparation method of inflatable pasting plate sleeve

Abstract

The invention discloses an end face anti-collision surface anti-knife-cutting inflatable plate pasting sleeve and a preparation method thereof, and relates to the technical field of plate pasting sleeves, the plate pasting sleeve comprises a composite sleeve, the composite sleeve sequentially comprises an inner sleeve layer, a filling layer and an outer plate surface layer from inside to outside, and anti-collision rings are compounded at the two ends of the composite sleeve; the outer surface layer is prepared from the following components in parts by weight: 30-60 parts of butadiene styrene rubber, 10-30 parts of natural rubber, 30-60 parts of polyurethane, 5-20 parts of modified UHMWPE fibers, 1-3 parts of a vulcanizing agent and 0.5-2 parts of an accelerant TMTD; through integral structural design and material optimization, the comprehensive performance and the use reliability are remarkably improved, the multi-layer composite system is combined with the end face anti-collision structure, effective absorption of high-energy impact is achieved, the end face collision deformation risk is reduced, tool scratching and fatigue cracking are restrained through the outer plate face layer, and the service life of the tool is prolonged. The service life can be obviously prolonged; and the equipment maintenance frequency is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plate mounting sleeves, and in particular to an inflatable plate mounting sleeve with an end face anti-collision surface and a knife-proof surface, and a preparation method thereof. Background Art

[0002] The plate mounting sleeve is a key component in flexographic printing equipment. As the carrier of the printing plate, it directly affects the printing quality and production efficiency. With the rapid development of the packaging and printing industry, the market's requirements for the quality of printed products are constantly improving, and the performance and reliability of the plate mounting sleeve are particularly important. Traditional plate mounting sleeves are mainly fixed mechanically, which is cumbersome to operate and takes a long time to replace, seriously affecting production efficiency.

[0003] The emergence of the pneumatic plate mounting sleeve is an important breakthrough in the development of printing technology. Its working principle is to expand the inner diameter of the sleeve through compressed air, so as to achieve rapid installation and removal between the sleeve and the pneumatic shaft. This design not only greatly improves the efficiency of plate roller replacement, but also ensures the concentricity and stability of sleeve installation. At present, the pneumatic plate mounting sleeve has become a standard configuration of modern flexographic printing presses.

[0004] In terms of structural design, the early inflatable plate mounting sleeves adopted a single-layer structure, mainly made of metal or fiberglass. With the development of technology, it gradually evolved into a multi-layer composite structure, including an inner support layer, an intermediate buffer layer and an outer surface layer. This multi-layer structure design is designed to meet different performance requirements: the inner layer needs to ensure sufficient strength and stability; the middle layer must have good shock absorption and buffering performance; the outer layer needs to take into account wear resistance, knife cut resistance and good adhesion to the printing plate.

[0005] CN210792404U discloses an air-supported plate mounting sleeve, comprising a composite sleeve, which comprises, from the inside to the outside, a glass fiber reinforced plastic inner sleeve layer, an elastomer layer, a filling structure layer and an outer plate surface layer, the glass fiber reinforced plastic inner sleeve layer, the elastomer layer, the filling structure layer and the outer plate surface layer being composited with each other, and protective rings are respectively composited at both ends of the sleeve, the protective rings at least cover the elastomer layer, the filling structure layer and the composite gap between the glass fiber reinforced plastic inner sleeve layer, the elastomer layer, the filling structure layer and the outer plate surface layer, and the inner diameter of the protective ring is greater than the inner diameter of the glass fiber reinforced plastic inner sleeve layer.

[0006] However, the existing inflatable plate mounting sleeve still has the following problems:

[0007] 1. Insufficient structural strength of the sleeve end face: During frequent loading and unloading, both ends of the sleeve are very likely to be damaged by collision. Especially when running at high speed, deformation or damage of the end face will cause the entire sleeve to be scrapped.

[0008] 2. Insufficient surface wear resistance: Traditional surface layer materials are prone to wear during long-term use, affecting the service life and printing accuracy of the sleeve.

[0009] 3. Composite layer bonding problem: Multi-layer sleeves are prone to layer separation during use, which seriously affects product performance and service life.

[0010] 4. Poor dimensional stability: During high-speed printing, the sleeve is prone to vibration and deformation, affecting the printing quality.

[0011] 5. Insufficient anti-knife performance: In daily operation, the surface of the sleeve often contacts various sharp tools, which can easily cause scratches and damage.

[0012] In response to these problems, the industry has been exploring new materials and process solutions. For example, modified rubber materials are used to improve wear resistance, high-performance fibers are used to enhance knife-cutting resistance, and new end face protection structures are developed. However, these solutions can only solve one aspect of the problem and it is difficult to achieve comprehensive improvement of multiple performances.

[0013] Therefore, developing an inflatable plate mounting sleeve with excellent comprehensive performance can not only solve various problems in the existing technology, but also meet the development needs of the printing industry, which has important practical significance and market value. In particular, improvements in end face anti-collision and surface anti-knife cutting will directly affect the service life and practicality of the product, and are of great significance to improving the production efficiency of printing companies. Summary of the invention

[0014] In order to address the deficiencies in the prior art, the purpose of the present invention is to provide an inflatable plate mounting sleeve with an end face anti-collision and anti-knife cut surface and a preparation method thereof. Through integrated structural design and material optimization, the comprehensive performance and reliability of use are significantly improved. The multi-layer composite system is combined with the end face anti-collision structure to achieve effective absorption of high-energy impacts and reduce the risk of end face collision deformation. The outer plate surface layer inhibits tool scratches and fatigue cracking, which can significantly extend the service life and reduce the frequency of equipment maintenance, providing a high-reliability core component solution for high-speed printing scenarios.

[0015] In order to achieve the above object, the present invention adopts the following technical solution:

[0016] The invention discloses an inflatable plate mounting sleeve with an end face anti-collision and a surface anti-knife cutting, comprising a composite sleeve, wherein the composite sleeve comprises an inner sleeve layer, a filling layer and an outer plate surface layer from the inside to the outside, the inner sleeve layer, the filling layer and the outer plate surface layer are compounded with each other, and anti-collision rings are compounded at both ends of the composite sleeve respectively; the outer plate surface layer is made of the following components by weight: 30-60 parts of styrene-butadiene rubber, 10-30 parts of natural rubber, 30-60 parts of polyurethane, 5-20 parts of modified UHMWPE fiber, 1-3 parts of vulcanizer and 0.5-2 parts of accelerator TMTD.

[0017] Preferably, the inner sleeve layer has a thickness of 0.8 to 3.0 mm.

[0018] Preferably, the thickness of the outer surface layer is 0.2 to 5.0 mm.

[0019] Preferably, the anti-collision ring at least covers the composite gap between the inner sleeve layer, the filling layer and the outer surface layer, and the inner diameter of the anti-collision ring is greater than the inner diameter of the inner sleeve layer.

[0020] Preferably, the filling layer is made of aluminum honeycomb panels and / or polypropylene honeycomb panels.

[0021] Preferably, the method for preparing the modified UHMWPE fiber comprises the following steps:

[0022] (1) placing UHMWPE fiber in an argon atmosphere and subjecting it to plasma treatment to obtain activated fiber; immersing the activated fiber in an ethanol aqueous solution, then adding chloropropyltriethoxysilane, adjusting the pH of the system, oscillating the reaction, filtering, washing, and drying the product to obtain chlorinated fiber;

[0023] Chloropropyl surface grafting: Argon plasma bombards the UHMWPE surface to induce chain scission, generate free radicals and introduce oxygen-containing polar groups (-OH) to form activation sites. In the ethanol / water system, chloropropyltriethoxysilane is hydrolyzed into silanol (Si-OH), which forms Si-O-Si bonds with the hydroxyl groups on the fiber surface through condensation reaction (dehydration), thereby covalently grafting the terminal chloropropyl group (-CH2CH2CH2Cl) to the fiber surface to complete the chlorination modification.

[0024] Preferably, in step (1), the UHMWPE fiber is polyethylene with a molecular weight of more than 1 million.

[0025] Preferably, in step (1), the plasma treatment conditions are 5 to 15 kV, a frequency of 50 kHz, and a vacuum degree of 400 to 600 Pa for 10 to 20 min.

[0026] Preferably, in step (1), the volume ratio of ethanol to water in the ethanol aqueous solution is 8-10:1; the amount ratio of activated fiber, ethanol aqueous solution and chloropropyltriethoxysilane is 10g:150-200mL:0.5-4g.

[0027] Preferably, in step (1), acetic acid is used to adjust the pH of the system to 4-5, and the oscillation reaction conditions are 45-60° C. for 3-6 hours; the product is washed with ethanol and deionized water for 3-5 times in sequence.

[0028] (2) Add chlorinated fiber, tetrafluorobutanediol and potassium carbonate to DMF, heat and react under a nitrogen atmosphere, filter the product, wash with alcohol and dry it to obtain fluorinated fiber.

[0029] Fluorination chain displacement reaction: The chloropropyl terminal Cl atom on the surface of the chlorinated fiber is replaced by the hydroxyl group of tetrafluorobutanediol in DMF through SN2 nucleophilic substitution reaction, realizing the directional introduction of the fluorocarbon chain (-O-CF2CF2CF2CF2-OH). Potassium carbonate provides an alkaline environment, activating the hydroxyl group as a strong nucleophilic reagent (-O - ), while neutralizing the generated HCl to avoid side reactions, ultimately forming fibers with a surface rich in fluorocarbon structures.

[0030] Preferably, in step (2), the usage ratio of chlorinated fiber, tetrafluorobutanediol, potassium carbonate and DMF is 10 g: 8-16 g: 3-6 g: 100-150 mL.

[0031] Preferably, in step (2), the temperature reaction conditions are to heat the reaction to 65-80° C. and stir the reaction at 200-400 r / min for 8-16 hours.

[0032] (3) The fluorinated fiber is immersed in dichloromethane, and 2,4-pentadienoic acid, DCC, and DMAP are added in sequence. The reaction is carried out in the dark, and the product is filtered, washed, and dried to obtain a modified UHMWPE fiber.

[0033] Olefin functional group esterification anchoring: The residual hydroxyl groups on the surface of the fluorinated fiber and the carboxylic acid groups of 2,4-pentadienoic acid undergo condensation esterification under the catalysis of DCC / DMAP. The light-shielding condition prevents the conjugated double bond (C=C) from unexpected polymerization under free radical or photolysis conditions, ensuring the stability of the modified structure.

[0034] Preferably, in step (3), the usage ratio of fluorinated fiber, dichloromethane, 2,4-pentadienoic acid, DCC and DMAP is 10 g: 100-150 mL: 8-12 g: 8-12 g: 0.8-1.2 g.

[0035] Preferably, in step (3), the reaction conditions are 20-35° C., 200-400 r / min, and stirring in the dark for 6-10 hours; the product is washed with tetrahydrofuran and acetone 2-3 times in sequence.

[0036] The present invention also claims to protect a preparation method of an inflatable plate mounting sleeve with an anti-collision surface on the end face and an anti-knife cut surface, comprising the following steps: winding an inner sleeve layer on a core rod mold, determining the thickness of the filling layer according to the outer diameter size of the plate mounting sleeve, and wrapping the filling material around the outer surface of the inner sleeve layer to obtain the filling layer; adding styrene-butadiene rubber, natural rubber, polyurethane, modified UHMWPE fiber, vulcanizer, and accelerator TMTD into a mixer and mixing and stirring at 400-600 r / min and 40-60° C. for 2-10 minutes to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 200-270° C., and vulcanizing and molding at 3-5 MPa and 120-150° C. for 6-10 minutes to obtain an outer plate surface layer; compounding the outer plate surface layer on the outer surface of the filling layer, grinding and polishing it to reach the designed outer diameter size to obtain a composite sleeve, and installing anti-collision rings at both ends of the composite sleeve to obtain the inflatable plate mounting sleeve with an anti-collision surface on the end face and an anti-knife cut surface.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention provides an inflatable plate mounting sleeve with an end face anti-collision and anti-knife cut surface. The synergistic effect of the inner sleeve layer, the filling layer and the outer plate surface layer effectively disperses the mechanical stress. The anti-collision rings at both ends further absorb the collision energy. The multi-layer composite structure strengthens the impact resistance and anti-knife cut performance. In the outer plate surface layer, styrene-butadiene rubber gives the material high elasticity and fatigue resistance, natural rubber supplements flexibility and wear resistance, polyurethane enhances resistance to oil stains and chemical solvent corrosion, and modified UHMWPE fiber improves the surface tear strength and anti-cutting threshold through a high-strength network structure. The vulcanization system promotes the close combination of the components to form a rigid-elastic balanced surface layer, which maintains structural stability and durability under the high-frequency pressure impact of the printing machinery.

[0039] 2. The present invention provides a modified UHMWPE fiber, which constructs multiple reinforcement mechanisms through surface functionalization: silane coupling treatment introduces chloropropyl active groups on the fiber surface to enhance the interfacial bonding strength with the rubber matrix; fluorination modification significantly reduces the fiber surface friction coefficient by introducing fluorocarbon chains, reduces the kinetic energy transfer and surface damage when the tool is scratched, and at the same time, the high stability of the CF bond gives the material resistance to ultraviolet aging, chemical medium corrosion resistance and hydrophobic properties, effectively inhibiting the damage of the humid environment to the interfacial bonding; the olefin-grafted pentadiene structure is similar to the carbon skeleton of the rubber molecular chain, and reduces the interfacial repulsion through structural compatibility. Its conjugated double bonds covalently bond with the sulfur cross-linking network during the rubber vulcanization process, so that the fiber and the matrix form chemical anchor points. This three-dimensional interpenetrating network structure blocks the crack propagation path through physical shielding, and improves the tear resistance with the help of the strong interaction force of chemical bonds, ensuring the long-term service performance of the sleeve under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show schematic diagrams of certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 The present invention is a schematic structural diagram of an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting function provided by the present invention.

[0042] In the figure, 1, inner layer; 2, filling layer; 3, outer surface layer; 4, anti-collision ring. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0044] Unless otherwise specified, the chemical reagents and materials in the present invention are purchased from commercial sources or synthesized from raw materials purchased from commercial sources.

[0045] UHMWPE fiber was purchased from Sinopec Yizheng Chemical Fiber Co., Ltd., model number is Baister Lylon.

[0046] An inflatable plate mounting sleeve with an end face anti-collision and a surface anti-knife cut, comprising a composite sleeve, wherein the composite sleeve comprises an inner sleeve layer 1, a filling layer 2, and an outer plate surface layer 3 from the inside to the outside, wherein the inner sleeve layer 1, the filling layer 2, and the outer plate surface layer 3 are composited with each other, and anti-collision rings 4 are respectively composited at both ends of the composite sleeve; the anti-collision ring at least covers the composite gaps among the inner sleeve layer, the filling layer, and the outer plate surface layer, and the inner diameter of the anti-collision ring is greater than the inner diameter of the inner sleeve layer.

[0047] The inner jacket layer is made of glass fiber and / or glass fiber reinforced plastic, and has a thickness of 0.8 to 3.0 mm; the filling layer is made of aluminum honeycomb panels and / or polypropylene honeycomb panels; and the outer surface layer has a thickness of 0.2 to 5.0 mm.

[0048] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0049] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 5-15 kV, frequency 50 kHz, and vacuum degree 400-600 Pa for 10-20 min to obtain activated fiber; 10 g of activated fiber was immersed in 150-200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 8-10:1), and then 0.5-4 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4-5 with acetic acid, and the reaction was carried out at 45-60° C. for 3-6 h. The product was filtered, washed with ethanol and deionized water for 3-5 times, and dried to obtain chlorinated fiber;

[0050] (2) Add 10 g of chlorinated fiber, 8-16 g of tetrafluorobutanediol, and 3-6 g of potassium carbonate to 100-150 mL of DMF, heat to 65-80° C., stir at 200-400 r / min for 8-16 h under a nitrogen atmosphere, filter the product, wash with alcohol, and dry to obtain fluorinated fiber.

[0051] (3) 10 g of fluorinated fiber is immersed in 100-150 mL of dichloromethane, and 8-12 g of 2,4-pentadienoic acid, 8-12 g of DCC, and 0.8-1.2 g of DMAP are added in sequence, and the mixture is stirred at 20-35° C. and 200-400 r / min in the dark for 6-10 h. The product is filtered, washed with tetrahydrofuran and acetone for 2-3 times in sequence, and dried to obtain a modified UHMWPE fiber;

[0052] (4) Winding the inner sleeve 1 on the core rod mold, determining the thickness of the filling layer 2 according to the outer diameter of the plate mounting sleeve, and wrapping the filling material on the outer surface of the inner sleeve 1 to obtain the filling layer 2; 300-600g of styrene-butadiene rubber, 100-300g of natural rubber, 300-600g of polyurethane, 50-200g of modified UHMWPE fiber, 10-30g of vulcanizing agent, and accelerator TMTD 5-20 g of the raw material is added into a mixer at 400-600 r / min and 40-60° C., mixed and stirred for 2-10 min to obtain a mixture, which is added into a twin-screw extruder at 200-270° C. for melt extrusion and granulation, and vulcanized at 3-5 MPa and 120-150° C. for 6-10 min to obtain an outer plate surface layer; the outer plate surface layer 3 is compounded on the outer surface of the filling layer 2, and the outer plate surface layer 3 is ground and polished to reach the designed outer diameter to obtain a composite sleeve, and anti-collision rings 4 are installed at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an end face anti-collision surface that is resistant to knife cutting.

[0053] The present invention will be further described below through specific embodiments.

[0054] Application Example 1

[0055] An inflatable plate mounting sleeve with an end face anti-collision and a surface anti-knife cut, comprising a composite sleeve, which comprises, from the inside to the outside, an inner sleeve layer 1, a filling layer 2, and an outer plate surface layer 3, the inner sleeve layer 1, the filling layer 2, and the outer plate surface layer 3 being composited with each other, and anti-collision rings 4 are respectively composited at both ends of the composite sleeve; the anti-collision ring covers the composite gap between the inner sleeve layer, the filling layer, and the outer plate surface layer, and the inner diameter of the anti-collision ring is greater than the inner diameter of the inner sleeve layer.

[0056] The inner sleeve layer is made of UHMWPE fiber fully impregnated in carboxyl styrene butadiene rubber latex, wound on a core mold, and formed into an inner sleeve layer with a thickness of 2.2 mm after drying and vulcanization; the filling layer is made of aluminum honeycomb panels; the thickness of the outer surface layer is 3.5 mm.

[0057] Example 1

[0058] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0059] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 4 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was oscillated at 60 ° C for 3 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0060] (2) 10 g of chlorinated fiber, 16 g of tetrafluorobutanediol, and 6 g of potassium carbonate were added to 120 mL of DMF, the temperature was raised to 80° C., and the mixture was stirred at 300 r / min for 8 h under a nitrogen atmosphere. The product was filtered, washed with alcohol, and dried to obtain fluorinated fiber.

[0061] (3) 10 g of fluorinated fiber was immersed in 120 mL of dichloromethane, and 12 g of 2,4-pentadienoic acid, 12 g of DCC, and 1.2 g of DMAP were added in sequence, and the mixture was stirred at 35 ° C and 300 r / min in the dark for 6 h. The product was filtered, washed twice with tetrahydrofuran and acetone in sequence, and dried to obtain modified UHMWPE fiber;

[0062] (4) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping the filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 600 g of styrene-butadiene rubber, 300 g of natural rubber, 600 g of polyurethane, 200 g of modified UHMWPE fiber, 30 g of a vulcanizer, and 20 g of an accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the composite sleeve until the outer diameter reaches the designed size, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an anti-collision surface on the end face to prevent knife cutting.

[0063] Example 2

[0064] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0065] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 3 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was carried out at 55 ° C for 4 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0066] (2) 10 g of chlorinated fiber, 12 g of tetrafluorobutanediol, and 5 g of potassium carbonate were added to 120 mL of DMF, the temperature was raised to 75° C., and the mixture was stirred at 300 r / min for 10 h under a nitrogen atmosphere. The product was filtered, washed with alcohol, and dried to obtain fluorinated fiber.

[0067] (3) 10 g of fluorinated fiber was immersed in 120 mL of dichloromethane, and 10 g of 2,4-pentadienoic acid, 10 g of DCC, and 1.0 g of DMAP were added in sequence. The mixture was stirred at 30° C. and 300 r / min in the dark for 7 h. The product was filtered, washed twice with tetrahydrofuran and acetone in sequence, and dried to obtain modified UHMWPE fiber.

[0068] (4) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping a filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 500 g of styrene-butadiene rubber, 250 g of natural rubber, 500 g of polyurethane, 150 g of modified UHMWPE fiber, 25 g of a vulcanizer, and 15 g of an accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the composite sleeve until the outer diameter reaches the designed size, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an anti-collision surface on the end face to prevent knife cutting.

[0069] Example 3

[0070] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0071] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 2 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was oscillated at 50 ° C for 5 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0072] (2) 10 g of chlorinated fiber, 10 g of tetrafluorobutanediol, and 4 g of potassium carbonate were added to 120 mL of DMF, the temperature was raised to 70° C., and the mixture was stirred at 300 r / min for 10 h under a nitrogen atmosphere. The product was filtered, washed with alcohol, and dried to obtain fluorinated fiber.

[0073] (3) 10 g of fluorinated fiber was immersed in 120 mL of dichloromethane, and 10 g of 2,4-pentadienoic acid, 10 g of DCC, and 1.0 g of DMAP were added in sequence. The mixture was stirred at 25 ° C and 300 r / min in the dark for 8 h. The product was filtered, washed twice with tetrahydrofuran and acetone in sequence, and dried to obtain modified UHMWPE fiber;

[0074] (4) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping a filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 400 g of styrene-butadiene rubber, 150 g of natural rubber, 400 g of polyurethane, 100 g of modified UHMWPE fiber, 15 g of a vulcanizer, and 15 g of a accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the outer plate mounting layer until the outer diameter reaches the designed size to obtain a composite sleeve, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an end face anti-collision surface that is resistant to knife cuts.

[0075] Example 4

[0076] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0077] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 0.5 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was carried out at 45 ° C for 6 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0078] (2) 10 g of chlorinated fiber, 8 g of tetrafluorobutanediol, and 3 g of potassium carbonate were added to 120 mL of DMF, the temperature was raised to 65° C., and the mixture was stirred at 300 r / min for 16 h under a nitrogen atmosphere. The product was filtered, washed with alcohol, and dried to obtain fluorinated fiber.

[0079] (3) 10 g of fluorinated fiber was immersed in 120 mL of dichloromethane, and 8 g of 2,4-pentadienoic acid, 8 g of DCC, and 0.8 g of DMAP were added in sequence. The mixture was stirred at 20 ° C and 300 r / min in the dark for 10 h. The product was filtered, washed twice with tetrahydrofuran and acetone in sequence, and dried to obtain modified UHMWPE fiber;

[0080] (4) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping the filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 300 g of styrene-butadiene rubber, 100 g of natural rubber, 300 g of polyurethane, 50 g of modified UHMWPE fiber, 10 g of a vulcanizer, and 5 g of an accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the outer plate mounting layer until the outer diameter reaches the designed size to obtain a composite sleeve, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an end face anti-collision surface that is resistant to knife cuts.

[0081] Comparative Example 1

[0082] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0083] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 4 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was oscillated at 60 ° C for 3 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0084] (2) 10 g of chlorinated fiber, 16 g of tetrafluorobutanediol, and 6 g of potassium carbonate were added to 120 mL of DMF, the temperature was raised to 80° C., and the mixture was stirred at 300 r / min for 8 h under a nitrogen atmosphere. The product was filtered, washed with alcohol, and dried to obtain fluorinated fiber.

[0085] (3) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping a filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 600 g of styrene-butadiene rubber, 300 g of natural rubber, 600 g of polyurethane, 200 g of fluorinated fiber, 30 g of a vulcanizer, and 20 g of a accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the outer plate mounting layer until the outer diameter reaches the designed size to obtain a composite sleeve, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an anti-collision surface on the end face to prevent knife cutting.

[0086] Comparative Example 2

[0087] A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and surface anti-knife cutting, comprising the following steps:

[0088] (1) Plasma treatment of UHMWPE fiber in an argon atmosphere at 10 kV, 50 kHz frequency, and 500 Pa vacuum for 15 min to obtain activated fiber; 10 g of activated fiber was immersed in 200 mL of ethanol aqueous solution (the volume ratio of ethanol to water was 9:1), and then 4 g of chloropropyltriethoxysilane was added, and the pH of the system was adjusted to 4.5 with acetic acid. The reaction was oscillated at 60 ° C for 3 h, and the product was filtered, washed with ethanol and deionized water for 4 times, and dried to obtain chlorinated fiber;

[0089] (2) Winding an inner sleeve layer on a core rod mold, determining the thickness of a filling layer according to the outer diameter of a plate mounting sleeve, and wrapping a filling material around the outer surface of the inner sleeve layer to obtain a filling layer; adding 600 g of styrene-butadiene rubber, 300 g of natural rubber, 600 g of polyurethane, 200 g of chlorinated fiber, 30 g of a vulcanizer, and 20 g of a accelerator TMTD into a mixer, mixing and stirring at 500 r / min and 50° C. for 6 min to obtain a mixture, adding the mixture into a twin-screw extruder for melt extrusion and granulation at 250° C., and vulcanizing and molding at 4 MPa and 130° C. for 8 min to obtain an outer plate mounting layer; compounding the outer plate mounting layer on the outer surface of the filling layer, grinding and polishing the outer plate mounting layer until the outer diameter reaches the designed size to obtain a composite sleeve, and installing anti-collision rings at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an end face anti-collision surface that is resistant to knife cuts.

[0090] The performance tests of the outer surface layers prepared in Examples 1 to 4 and Comparative Examples 1 to 2 were performed. The water contact angle was tested with reference to GB / T 30693-2014 "Measurement of the contact angle of plastic film with water"; the Shore hardness was tested with reference to GB / T 531.1-2008 "Test method for indentation hardness of vulcanized rubber or thermoplastic rubber Part 1: Shore durometer method (Shore hardness)"; the wear resistance was tested with reference to GB / T 1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)"; the wear resistance was tested with reference to GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber" to test its tensile strength and elongation at break, and GB / T529-2008 "Determination of tear strength of vulcanized rubber or thermoplastic rubber (trouser-shaped, right-angled and crescent-shaped specimens)" to test its tear strength; after continuous radiation aging for 300 hours under a 40W, 315-400nm wavelength ultraviolet lamp, its tensile strength, elongation at break and tear strength were tested again. Specific data are shown in Table 1.

[0091] Table 1 Test results of outer surface layer performance

[0092]

[0093] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An inflatable plate mounting sleeve with an end face anti-collision and a surface anti-knife cutting, comprising a composite sleeve, wherein the composite sleeve comprises, from the inside to the outside, an inner sleeve layer (1), a filling layer (2), and an outer plate surface layer (3), wherein the inner sleeve layer (1), the filling layer (2), and the outer plate surface layer (3) are composited with each other, and characterized in that: The two ends of the composite sleeve are respectively composited with anti-collision rings (4); the outer surface layer (3) is made of the following components by weight: 30-60 parts of styrene-butadiene rubber, 10-30 parts of natural rubber, 30-60 parts of polyurethane, 5-20 parts of modified UHMWPE fiber, 1-3 parts of vulcanizing agent, and 0.5-2 parts of accelerator TMTD.

2. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 1 is characterized in that: The preparation method of the modified UHMWPE fiber comprises the following steps: (1) placing UHMWPE fiber in an argon atmosphere and subjecting it to plasma treatment to obtain activated fiber; immersing the activated fiber in an ethanol aqueous solution, then adding chloropropyltriethoxysilane, adjusting the pH of the system, oscillating the reaction, filtering, washing, and drying the product to obtain chlorinated fiber; (2) Add chlorinated fiber, tetrafluorobutanediol and potassium carbonate to DMF, heat and react under a nitrogen atmosphere, filter the product, wash with alcohol and dry it to obtain fluorinated fiber. (3) The fluorinated fiber is immersed in dichloromethane, and 2,4-pentadienoic acid, DCC, and DMAP are added in sequence. The reaction is carried out in the dark, and the product is filtered, washed, and dried to obtain a modified UHMWPE fiber.

3. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (1), the plasma treatment conditions are 5 to 15 kV, a frequency of 50 kHz, and a vacuum degree of 400 to 600 Pa for 10 to 20 minutes.

4. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (1), the volume ratio of ethanol to water in the ethanol aqueous solution is 8-10:1; the amount ratio of activated fiber, ethanol aqueous solution and chloropropyltriethoxysilane is 10g:150-200mL:0.5-4g.

5. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (1), acetic acid is used to adjust the pH of the system to 4-5, and the oscillation reaction conditions are 45-60° C. for 3-6 hours; the product is washed with ethanol and deionized water for 3-5 times in sequence.

6. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (2), the usage ratio of chlorinated fiber, tetrafluorobutanediol, potassium carbonate and DMF is 10 g: 8-16 g: 3-6 g: 100-150 mL.

7. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (2), the temperature reaction conditions are to heat the reaction to 65-80° C. and stir the reaction at 200-400 r / min for 8-16 hours.

8. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (3), the usage ratio of fluorinated fiber, dichloromethane, 2,4-pentadienoic acid, DCC and DMAP is 10 g: 100-150 mL: 8-12 g: 8-12 g: 0.8-1.2 g.

9. The inflatable plate mounting sleeve with end face anti-collision surface and knife-cutting protection according to claim 2, characterized in that: In step (3), the reaction conditions in the dark are 20-35° C., 200-400 r / min, and stirring in the dark for 6-10 hours; the product is washed with tetrahydrofuran and acetone 2-3 times in sequence.

10. A method for preparing an inflatable plate mounting sleeve with an end face anti-collision and a knife-cutting-resistant surface as claimed in any one of claims 1 to 9, characterized in that: The invention comprises the following steps: winding an inner sleeve layer (1) on a core rod mold, determining the thickness of a filling layer (2) according to the outer diameter size of a plate mounting sleeve, and wrapping a filling material around the outer surface of the inner sleeve layer (1) to obtain a filling layer (2); adding styrene-butadiene rubber, natural rubber, polyurethane, modified UHMWPE fiber, a vulcanizing agent, and an accelerator TMTD into a mixer and mixing and stirring at 400-600 r / min and 40-60° C. for 2-10 minutes to obtain a mixture, adding the mixture into a twin-screw extruder and melting and extruding and granulating at 200-270° C., and vulcanizing and molding at 3-5 MPa and 120-150° C. for 6-10 minutes to obtain an outer plate mounting layer; compounding an outer plate mounting layer (3) on the outer surface of the filling layer (2), grinding and polishing the outer plate mounting layer to reach the designed outer diameter size to obtain a composite sleeve, and installing anti-collision rings (4) at both ends of the composite sleeve to obtain an inflatable plate mounting sleeve with an end face anti-collision surface that is resistant to knife cutting.

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