Electricity-saving tangential belt for super-long intelligent ring spinning frame and preparation method thereof

Abstract

The invention discloses an electricity-saving tangential belt for a super-long intelligent ring spinning frame, which comprises an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, and transition layers are arranged between the upper surface transmission layer and the middle skeleton fabric layer and between the middle fiber skeleton layer and the lower surface transmission layer. The invention discloses a preparation method of a power-saving tangential belt for a super-long intelligent ring spinning frame, the product has excellent performances such as flexing resistance, high stretching strength, proper friction coefficient and wear resistance, is suitable for the intelligent super-long spinning frame, improves the product quality and reduces equipment consumables.

Description

Technical Field

[0001] The invention relates to a power-saving dragon belt material, in particular to a power-saving dragon belt for an ultra-long intelligent ring spinning machine and a preparation method thereof. Background Art

[0002] At present, the technology of ring spinning machine is relatively mature and has become the key equipment for spinning. According to statistics, more than 80% of the world's spinning equipment is ring spinning machine. my country has a ring spinning scale of about 120 million spindles, accounting for about 50% of the world's total spindles; and the output of ring spinning machine accounts for about 85% of the total output of fine yarn in the country. It can be seen that ring spinning machine occupies an important position in spinning. The use of super-long spinning car and fine winding connection is a specific manifestation of spinning automation and continuity. As the ring spinning machine develops towards multi-spindle, the super-long spinning car can be connected with the automatic winder, and the process from fine yarn doffing to bobbin winding and forming is completed continuously, which saves the manual yarn loading, yarn feeding tube and other links in the middle, so that the labor is further reduced. Collective automatic doffing requires less labor, and the doffing breakage rate is lower than that of manual doffing, which improves the production efficiency of the equipment.

[0003] The rapid development of spinning machines has put forward higher requirements for transmission belts. Tangential belt transmission can ensure consistent spindle speed and reduce uneven twist between spindles. The use of multiple spindles and one tangential belt drive motor improves motor efficiency and greatly reduces energy consumption. The spinning machine is equipped with an efficient and low-maintenance tangential belt drive system. The system uses optimized bearing technology in the steering and tension wheels to effectively reduce air friction. Compared with the traditional four-spindle belt drive, the tangential belt drive saves 25% of the contact area and performs outstandingly in energy saving. The spindle belt brake is automatically triggered and disappears without loss of production. At the same time, the tangential belt drive system is sealed, without the scattering and accumulation of flying flowers caused by cyclones, which can achieve the lowest manual cleaning cost. Maintenance is simple and time-saving, which can reduce downtime. All spindle speeds are consistent, which can reduce the twist difference between spindles. The number of transmission parts is reduced, which reduces the pressure of equipment maintenance and cleaning. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses an energy-saving dragon belt for an ultra-long intelligent ring spinning machine and a preparation method thereof. The product has excellent properties such as flexural resistance, high tensile strength, suitable friction coefficient, and wear resistance. It is suitable for intelligent ultra-long spinning machines, and can improve product quality and reduce equipment consumables.

[0005] The present invention is achieved through the following technical solutions: The invention discloses an energy-saving dragon belt for an ultra-long intelligent ring spinning machine, comprising an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, wherein transition layers are provided between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer, and the thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2, and the total thickness is 1.8-2.0 mm.

[0006] The transmission tangential belt is one of the important twisting components in the ring spinning process. The quality requirements for the tangential belt are: stable high-speed operation, high tensile strength, small elongation, good wear resistance, power saving, and easy use and maintenance.

[0007] The upper surface transmission layer and the lower surface transmission layer of the present invention are made of highly wear-resistant materials, and special synthetic rubber and new additives are used to reduce the wear amount from ≤100 mg to ≤80 mg, and the friction coefficient is stabilized at 0.60±0.05. The belt transmission mode of the super-long spinning machine is tangential transmission, which can save 25% of the contact area compared with the traditional four-spindle belt transmission, and has outstanding performance in energy saving, but it puts forward higher requirements on the wear resistance and friction coefficient stability of the tangential belt.

[0008] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are mixed in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, and the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:52~55:1~5:5~12, and the reinforcing agent is mainly a silicate reinforcing agent and white carbon black; the antioxidant mainly includes amine or phenol antioxidant, preferably bisphenol A and antioxidant 2246; the vulcanizing agent is mainly sulfur-containing organic matter or peroxide vulcanizing agent, such as insoluble sulfur. Through the ratio of the components of the transmission layer, the comprehensive performance of the super-long spinning machine belt is improved, so that it has good wear resistance and a suitable friction coefficient.

[0009] During the manufacturing process, appropriate patterns are molded on the surface of the transmission layer to make the surface pattern structure uniform to ensure wear resistance and provide a suitable friction coefficient.

[0010] The middle polyester fiber skeleton layer of the present invention adopts high-tensile strength polyester fabric, so that the 1% tensile strength reaches ≥18N / mm.

[0011] The skeleton layer determines the strength and elongation of the belt. The skeleton of the transmission belt has high strength and low elongation, so that the elongation of the transmission belt changes little during use, the transmission speed is stable, and there is no deformation or deviation. Since polyester fiber contains phenyl on the main chain and the molecular weight is between 19000 and 21000, the moisture absorption is very small, which is only (0.4-0.5)% at 65%RH, while the moisture absorption of nylon-6 is (3.5-5.0)% under the same conditions. The high-modulus low-stretch polyester fiber processed with a three-dimensional mesh structure has almost no reaction to changes in environmental temperature and humidity. Therefore, the skeleton material of the newly developed power-saving transmission belt chooses high-strength polyester fabric.

[0012] The elastomeric transition layer of the present invention increases the interlayer adhesion strength, that is, the adhesion strength between the polyester fabric and the transition layer, from 2.5 N / mm to ≥3.0 N / mm, and the joint strength reaches 80% of the belt body strength.

[0013] The energy-saving transmission belt uses high-strength polyester fabric as the skeleton, the main material of the friction layer is special rubber, and the modified elastomer is used as the transition layer. There is no good adhesion between the elastomer and the transmission layer, and between the elastomer and the polyester fabric. If a special adhesive is applied between them, the process is complicated and the operation is difficult, and harmful gases that affect the environment will be produced. In order to achieve good adhesion of the energy-saving transmission belt, a modified material is selected as the transition layer to increase the bonding strength.

[0014] TPEE has poor oxidation stability and is not easy to bond. You can choose to add antioxidants to improve its oxidation resistance and extend its service life. The molecular weight of polyester elastomer (TPEE) is 18,000~25,000.

[0015] The polyester elastomer is mixed with the polylactic acid-polyethylene glycol block copolymer in a mass ratio of 8:1-2 to obtain a modified polyester material. The molecular weight of the polylactic acid-polyethylene glycol block copolymer is 30,000-40,000.

[0016] The modified polyester material needs to be processed into sheets before it can fit with the surface friction layer and the skeleton layer, and then compounded into an ultra-long spinning machine belt. The extrusion molding method is selected for sheet processing. The processing technology is as follows: After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0017] The present invention also provides a method for preparing an energy-saving dragon belt for an ultra-long intelligent ring spinning frame, comprising the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems and are made into wear-resistant friction transmission layers through internal mixing.

[0018] During the manufacturing process, the surface of the friction layer is patterned to make the surface pattern structure uniform to ensure wear resistance and provide a suitable friction coefficient.

[0019] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric stays in the treatment agent polyurethane dispersion for 2-3 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: add 4.5% by mass of isocyanate aqueous crosslinking agent to 20% aliphatic polyurethane aqueous dispersion and stir for 2-4 hours.

[0020] (3) Preparation of buffer layer: The specific operating parameters for extruding the modified polyester material into sheets are: .

[0021] The sheet is processed by extrusion molding. After being calendered by a three-roll calender, cooled and shaped, it is pulled to the trimming machine for trimming and rolled up. We choose a single screw extruder for the molding of thermoplastic sheets.

[0022] (4) Composite: The three layers of materials are composited at a temperature of 160 to 170°C, a pressure of 80 to 100 bar, and a time of 18 to 20 minutes.

[0023] In the present invention, a quick and convenient joint process, a toothed joint, no running direction requirements, smooth joints are ensured, and the joint thickness deviation is ±0.05mm of the belt thickness.

[0024] The flat belt joint method adopts the overlap method, which has requirements for the running direction of the flat belt. If the installation direction is wrong, the joint is easy to crack, which affects the service life of the flat belt. In addition, it is difficult to achieve a smooth transition in the joint part treatment of the overlap joint method. The advantages of the toothed joint are: a. Short time. b. Smooth joint without steps. c. No glue is needed, easy to operate. The joint thickness deviation is ±0.05mm of the belt body thickness.

[0025] Beneficial effects of the present invention: (1) The wear-resistant rubber surface friction layer used in the present invention makes the wear loss ≤80mg and the friction coefficient stable at 0.60±0.05.

[0026] (2) The skeleton material of the present invention adopts high-tensile strength polyester fabric, and the 1% tensile strength is ≥18N / mm.

[0027] (3) The modified thermoplastic elastomer transition layer used in the present invention has an adhesion strength of ≥3.0 N / mm and a joint strength of 80% of the belt body strength.

[0028] (4) The joint process makes the joint thickness deviation within the strip thickness ±0.05mm.

[0029] (5) The energy-saving dragon belt for the super-long intelligent ring spinning machine of the present invention has good belt stiffness, high tensile strength and high transmission efficiency due to the ultra-high modulus of the polyester fiber skeleton layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of a power-saving dragon belt; In the figure, 1. upper surface transmission layer, 2. transition layer, 3. middle fiber skeleton layer, 4. transition layer, 5. lower surface transmission layer; Figure 2 This is the diagram of the spindle belt transmission method of the spinning frame; Figure 3 This is a diagram of the tangential belt transmission method. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the examples. The raw materials used in the examples and comparative examples are all commercially available. The polyester elastomer is purchased from DuPont.

[0032] Example 1 An energy-saving dragon belt for an ultra-long intelligent ring spinning machine includes an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer. There are transition layers between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer. The thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 1.9 mm.

[0033] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, and the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:52:2:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, with a mass ratio of 1:1; the vulcanizing agent is insoluble sulfur.

[0034] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0035] The molecular weight of polyester elastomer (TPEE) is 18000-25000. The molecular weight of polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and polylactic acid-polyethylene glycol block copolymer are mixed at a mass ratio of 8:1 to obtain a modified polyester material.

[0036] The present invention also provides a method for preparing an energy-saving dragon belt for an ultra-long intelligent ring spinning frame, comprising the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0037] During the manufacturing process, the surface of the friction layer is patterned to make the surface pattern structure uniform to ensure wear resistance and provide a suitable friction coefficient.

[0038] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0039] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0040] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0041] (4) Composite: The three layers of materials are composited at a temperature of 160°C, a pressure of 100 bar, and a time of 20 min. Preparation of the skeleton layer: The polyester fabric is activated by a treatment agent.

[0042] In the present invention, a quick and convenient joint process, a toothed joint, no running direction requirements, smooth joints are ensured, and the joint thickness deviation is ±0.05mm of the belt thickness.

[0043] Example 2 An energy-saving dragon belt for an ultra-long intelligent ring spinning machine includes an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer. There are transition layers between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer. The thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 1.8 mm.

[0044] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:55:5:8, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

[0045] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0046] The molecular weight of polyester elastomer (TPEE) is 18000-25000. The molecular weight of polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and polylactic acid-polyethylene glycol block copolymer are mixed at a mass ratio of 8:1 to obtain a modified polyester material.

[0047] The present invention also provides a method for preparing an energy-saving dragon belt for an ultra-long intelligent ring spinning frame, comprising the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0048] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0049] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0050] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0051] (4) Composite: The three layers of materials are composited at a temperature of 165°C, a pressure of 90 bar, and a time of 19 min.

[0052] In the present invention, a quick and convenient joint process, a toothed joint, no running direction requirements, smooth joints are ensured, and the joint thickness deviation is ±0.05mm of the belt thickness.

[0053] Example 3 An energy-saving dragon belt for an ultra-long intelligent ring spinning machine includes an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer. There are transition layers between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer. The thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 2.0 mm.

[0054] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:53:3:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

[0055] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0056] The transition layer is a modified polyester material, and the molecular weight of the polyester elastomer (TPEE) is 18000-25000. The molecular weight of the polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and the polylactic acid-polyethylene glycol block copolymer are mixed at a mass ratio of 8:1 to obtain a modified polyester material.

[0057] The present invention also provides a method for preparing an energy-saving dragon belt for an ultra-long intelligent ring spinning frame, comprising the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0058] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0059] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0060] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0061] (3) Preparation of buffer layer: extrusion of modified elastomer into sheets: .

[0062] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0063] (4) Composite: The three layers of materials are composited at a temperature of 170°C, a pressure of 80 bar, and a time of 18 min.

[0064] In the present invention, a quick and convenient joint process, a toothed joint, no running direction requirements, smooth joints are ensured, and the joint thickness deviation is ±0.05mm of the belt thickness.

[0065] Comparative Example 1 A power-saving dragon belt comprises an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, a transition layer is provided between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer, and the thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 2.0 mm.

[0066] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber and NBR rubber in a ratio of 4:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:52:2:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, in a mass ratio of 1:1; the vulcanizing agent is insoluble sulfur.

[0067] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0068] The transition layer is a modified polyester material, and the molecular weight of the polyester elastomer (TPEE) is 18000-25000. The molecular weight of the polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and the polylactic acid-polyethylene glycol block copolymer are mixed at a mass ratio of 8:1 to obtain a modified polyester material.

[0069] The preparation method of the power-saving dragon belt comprises the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber and NBR rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems, and softening systems and are mixed to form wear-resistant friction transmission layers.

[0070] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0071] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0072] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0073] (4) Composite: The three layers of materials are composited at a temperature of 150°C, a pressure of 100 bar, and a time of 20 min.

[0074] Comparative Example 2 A power-saving dragon belt comprises an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, a transition layer is provided between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer, and the thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 2.0 mm.

[0075] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:53:3:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

[0076] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0077] The transition layer is polyester elastomer (TPEE) with a molecular weight of 18,000~25,000.

[0078] The preparation method of the power-saving dragon belt comprises the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0079] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0080] (3) Preparation of buffer layer: elastomer extrusion into sheets: .

[0081] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0082] (4) Composite: The three layers of materials are composited at a temperature of 170°C, a pressure of 120 bar, and a time of 20 min.

[0083] Comparative Example 3 A power-saving dragon belt comprises an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, a transition layer is provided between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer, and the thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 2.0.

[0084] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:53:3:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

[0085] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0086] Transition layer: The molecular weight of polyester elastomer (TPEE) is 18000-25000. The molecular weight of polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and polylactic acid-polyethylene glycol block copolymer are mixed at a mass ratio of 1:1 to obtain a modified polyester material.

[0087] The preparation method of the power-saving dragon belt comprises the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0088] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0089] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0090] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0091] (4) Composite: The three layers of materials are composited at a temperature of 170°C, a pressure of 100 bar, and a time of 22 min.

[0092] Comparative Example 4 A power-saving dragon belt comprises an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer, a transition layer is provided between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer, and the thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2. The total thickness is 2.0 mm.

[0093] The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:53:3:6, the reinforcing agent is nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

[0094] The middle fiber skeleton layer is polyester fiber, the main chain contains phenyl, and the molecular weight is between 19000 and 21000. High modulus low elongation polyester fiber processed with three-dimensional network structure.

[0095] Transition layer: The molecular weight of polyester elastomer (TPEE) is 18000-25000. The molecular weight of polylactic acid is 30000-40000. The polyester elastomer and polylactic acid are mixed at a mass ratio of 8:1 to obtain a modified polyester material.

[0096] The preparation method of the power-saving dragon belt comprises the following steps: (1) Preparation of upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through mixing.

[0097] (2) Preparation of skeleton layer: The polyester fiber fabric is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2 hours.

[0098] (3) Preparation of buffer layer: Extrusion of modified polyester material into sheets: .

[0099] After being calendered by a three-roll calender and cooled and shaped, it is pulled to the trimming machine for trimming and coiled.

[0100] (4) Composite: The three layers of materials are composited at a temperature of 170 °C, a pressure of 150 bar, and a time of 18 min.

[0101] Test method: Use a tensile testing machine to measure the 1% elongation and adhesion strength, a fabric abrasion machine to measure the abrasion value, and a friction coefficient meter to measure the friction coefficient of the transmission layer.

[0102] Table 1 is the test data of Examples 1-3 and Comparative Examples 1-4 It can be seen from the data of the embodiments and comparative examples that the performance of the dragon belt is significantly improved by rationally designing and modifying the transmission layer, the middle polyester fiber skeleton layer, and the transition layer. The product prepared by the present invention has excellent properties such as flex resistance, high tensile strength, suitable friction coefficient, and wear resistance, and is suitable for intelligent ultra-long spinning machines, and improves product quality.

Claims

1. An energy-saving dragon belt for an ultra-long intelligent ring spinning machine, characterized in that: It includes an upper surface transmission layer, a middle fiber skeleton layer and a lower surface transmission layer. There are transition layers between the upper surface transmission layer and the middle skeleton fabric layer, and between the middle fiber skeleton layer and the lower surface transmission layer. The thickness ratio of the upper surface transmission layer, the middle polyester fiber skeleton layer, the lower surface transmission layer and the transition layer is 1:3:1:2, and the total thickness is 1.8~2.0mm.

2. The energy-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 1 is characterized in that: The transmission layer is composed of the following components in parts by weight: main material: oil-resistant CR rubber, NBR rubber and MPU rubber are matched in a ratio of 4:3:3 respectively; reinforcing agent, antioxidant and vulcanizing agent are added as wear-resistant reinforcing materials, and the mass ratio of the main material to the reinforcing agent, antioxidant and vulcanizing agent is 100:52~55:1~5:5~12, the reinforcing agents are nano aluminum silicate and white carbon black; the antioxidant is bisphenol A and antioxidant 2246, and the mass ratio is 1:1; the vulcanizing agent is insoluble sulfur.

3. The energy-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 1 is characterized in that: The middle fiber skeleton layer is polyester fiber, which contains phenyl on the main chain and has a molecular weight between 19,000 and 21,000.

4. The energy-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 3 is characterized in that: High modulus, low elongation polyester fabric with three-dimensional mesh structure.

5. The energy-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 1 is characterized in that: The transition layer is a modified polyester material. The molecular weight of the polyester elastomer (TPEE) is 18000-25000, and the molecular weight of the polylactic acid-polyethylene glycol block copolymer is 30000-40000. The polyester elastomer and the polylactic acid-polyethylene glycol block copolymer are mixed in a mass ratio of 8:1-2 to obtain a modified polyester material.

6. A method for preparing an energy-saving dragon belt for an ultra-long intelligent ring spinning frame according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Preparation of the upper and lower surface transmission layers: Oil-resistant CR rubber, NBR rubber and MPU rubber are added with other reinforcement systems, vulcanization systems, anti-aging systems and softening systems to form wear-resistant friction transmission layers through internal mixing; (2) Preparation of skeleton layer: polyester fiber is activated by a treatment agent; (3) Preparation of buffer layer: the modified polyester material is extruded into a sheet; (4) Composite: The three layers of materials are composited at a temperature of 160 ~ 170 °C, a pressure of 80 ~ 100 bar, and a time of 18 ~ 20 min.

7. The method for preparing a power-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 6, characterized in that: The polyester fiber is activated by the treatment agent: the polyester fiber fabric is kept in the treatment agent polyurethane dispersion for 2-3 minutes at a reaction temperature of 140°C. The polyurethane dispersion is: 20% aliphatic polyurethane aqueous dispersion is added with 4.5% by mass of isocyanate aqueous crosslinking agent, and stirred for 2-4 hours.

8. The method for preparing a power-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 6, characterized in that: The specific operating parameters for extruding the modified polyester material into sheets are: 。 9. The method for preparing a power-saving dragon belt for an ultra-long intelligent ring spinning frame according to claim 6, characterized in that: The joint process adopts toothed joint.

Images