CN112606508A - Steel plate conveying belt for conveying metal plates and preparation method thereof - Google Patents
Steel plate conveying belt for conveying metal plates and preparation method thereof Download PDFInfo
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- CN112606508A CN112606508A CN202011466422.XA CN202011466422A CN112606508A CN 112606508 A CN112606508 A CN 112606508A CN 202011466422 A CN202011466422 A CN 202011466422A CN 112606508 A CN112606508 A CN 112606508A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
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- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/10—Removing layers, or parts of layers, mechanically or chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/584—Scratch resistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2433/00—Closed loop articles
- B32B2433/02—Conveyor belts
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
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Abstract
The invention discloses a steel plate conveying belt for conveying metal plates, which is of a two-cloth two-glue structure and comprises a conveying belt upper part and a conveying belt lower part, wherein the conveying belt upper part is formed by compounding a high-strength fabric framework coated with PU glue, a TPU coating and a silicon sulfide modified TPU thermoplastic resin coating, and the conveying belt lower part is formed by compounding a high-strength fabric framework coated with PU glue and a foaming coating. The invention also discloses a preparation method of the conveyer belt for conveying the metal plates. The two-rubber-coated conveying belt obtained by the invention has the thickness of 3.5-6mm, and has high production efficiency and less loss compared with the existing steel plate conveying belt which needs coating application for three to five times.
Description
Technical Field
The invention relates to the technical field of conveying belts, in particular to a steel plate conveying belt for conveying metal plates and a preparation method thereof.
Background
At present, polyester composite fabric is mostly adopted as a bearing framework of a steel plate conveying belt for conveying metal plates in the processing of automobiles, steel plates, aluminum plates and the like, polyurethane (TPU) resin is coated on the bearing framework, the thickness is usually 3-6mm, the TPU resin coated polyester composite fabric needs to be laminated in multiple layers, at least three times or even five times of laminating is needed, the production efficiency is low, the thickness of the later-stage laminating is increased, the laminating difficulty is increased, the strength is low, and the steel plate conveying belt cannot meet the use requirement and needs to be reprocessed or discarded. In addition, in the steel plate conveying process, the adhesive tape is easily poked into the steel plate, the iron blocks and the like, the adhesive tape is possibly scratched, and the adhesive tape is torn seriously, so that the service life is influenced. Therefore, how to improve the production efficiency of the steel plate conveyer belt and the scratch resistance of the conveyer belt to improve the service cycle of the steel plate conveyer belt can bring good economic benefits.
After the TPU particles are foamed, the elasticity is high, the weight is light, the volume expansion is 5-8 times, the defects of the TPU particles in the aspects of large weight, high hardness, poor shock absorption performance and the like are overcome, and meanwhile, the TPU particles are lighter in weight, stronger in air permeability, environment-friendly, wear-resistant, high-elastic and yellowing-resistant, are widely applied to the shoe pad material industry and are not applied to the field of conveying belts.
The silicon sulfide thermoplastic resin is uniformly dispersed in continuous phases of thermoplastic resins such as polyurethane, polyamide and the like to form stable alloy through fully vulcanized silicon rubber particles, the surface of the organic silicon has enrichment property, hydrophobicity and lubricity, the performances of the organic silicon and the organic silicon are expanded, the friction coefficient of the surface of the material is effectively reduced, and the silicon sulfide thermoplastic resin has excellent high-temperature resistance, good wear resistance, oil resistance and hydrolysis resistance.
Disclosure of Invention
One of the objectives of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a steel plate conveyor belt for conveying metal plates, which has a simple production process, high efficiency and scratch resistance, and has a smaller turning radius, thereby helping to reduce energy consumption, and simultaneously maintaining high strength and prolonging service life.
The second purpose of the invention is to provide a preparation method of the conveyer belt.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a steel sheet conveyer belt for sheet metal carries, this steel sheet conveyer belt is two glued structures of two cloths, includes the conveyer belt upper strata portion and the conveyer belt lower floor portion that form by the laminating of solvent-free bi-component polyurethane glue, wherein conveyer belt upper strata portion adopts the high strength fabric skeleton, TPU coating and the compound TPU thermoplastic resin coating that modifies of silicon sulfide of coating PU glue to form, conveyer belt lower floor portion adopts the high strength fabric skeleton and the foaming coating of coating PU glue to form compositely.
In a preferred embodiment of the present invention, the high strength fabric frame comprises warp and weft, wherein the warp comprises polyarylate liquid crystal fibers and polyester fibers, the content of polyarylate liquid crystal fibers is 20-50% of the content of the warp, and the weft comprises polyester monofilaments.
In a preferred embodiment of the invention, the coating thickness of the TPU coating is between 0.1 and 0.5 mm.
In a preferred embodiment of the invention, the silicone sulfide modified TPU thermoplastic resin coating has a thickness of 0.1 mm.
In a preferred embodiment of the invention, the foamed coating is formed by mixing foamed TPU particles with solvent-free bi-component polyurethane glue and then coating the mixture on the high-strength fabric framework of the primary coating PU glue for calendering.
In a preferred embodiment of the invention, the diameter of the foamed TPU particles is from 3 to 7 mm.
In a preferred embodiment of the invention, the foamed TPU particles are 100 parts and the solvent-free two-component polyurethane cement is 10 to 50 parts.
In a preferred embodiment of the present invention, the solvent-free two-component polyurethane glue is prepared by using CN 107459960A.
In a preferred embodiment of the invention, the thickness of the conveyor belt is 3.5-6 mm.
The preparation method of the conveyer belt for conveying the metal plates comprises the following steps:
(1) coating PU glue on two surfaces of the high-strength fabric framework, and drying to obtain the high-strength fabric framework coated with the PU glue for later use;
(2) uniformly mixing foamed TPU particles and solvent-free bi-component polyurethane glue under the heating condition, coating the mixture on the high-strength fabric skeleton coated with the PU glue prepared in the step (1) by using a scraper within a certain time, baking the mixture by using an oven until the surface is slightly dried, then coating a cold water roller, cooling the mixture to 40-60 ℃, calendering the mixture by using a double-roller tabletting machine until the thickness is 3-5mm, coating a layer of release paper or PE film on the surface, rolling the mixture until the mixture is completely cured to obtain the lower layer part of the conveying belt, and removing the release paper or the PE film;
(3) extruding a TPU coating layer on the high-strength fabric framework coated with the glue prepared in the step (1), and extruding a silicon sulfide modified TPU thermoplastic resin coating layer on the outer surface of the TPU coating layer to obtain an upper layer part of the conveying belt;
(4) coating solvent-free bi-component polyurethane glue on the surface of the foaming coating layer on the lower part of the conveyer belt prepared in the step (2) by using a scraper, baking the foaming coating layer in an oven at the temperature of 80-120 ℃ for 1-2min, attaching the foaming coating layer to the surface of the fabric on the upper part of the conveyer belt prepared in the step (3), pressing the fabric to the required thickness by using a double-roller tabletting machine, cooling the coating cold water roller to 40-60 ℃, and rolling the coating cold water roller to obtain the conveyer belt with two pieces of cloth and two pieces of glue.
In a preferred embodiment of the present invention, in the step (2), the heating condition is 60-100 ℃ and the certain time is 3-10min, the temperature of the oven is controlled to be 80-120 ℃, and the baking time is 1-10 min.
Compared with the prior art, the invention has the following beneficial effects:
(1) the high-strength fabric has the advantages that the polyarylate liquid crystal fibers are added to the high-strength fabric framework, and the fabric has the performances of high strength, high modulus, high temperature resistance, chemical resistance, weather resistance and the like;
(2) the solvent-free bi-component polyurethane glue mixed foaming TPU particles are coated, the solvent-free bi-component polyurethane can be surface-dried at the temperature of 60-120 ℃ for 1-10min, the solidification and the forming are fast, the foaming TPU particles enable the coating layer to have good buffering elasticity, the situation that steel plates, iron blocks and the like are easy to stick into adhesive tapes is effectively avoided, and the scratch resistance can be enhanced; the steel plate conveying belt has good foaming elasticity, so that the turning radius is smaller, and the reduction of energy consumption is facilitated;
(3) extruding a Thermoplastic Polyurethane (TPU) and silicon sulfide modified TPU thermoplastic resin coating on the high-strength fabric framework to enhance the scratch resistance of the coating;
(4) the obtained conveying belt with two pieces of cloth and two pieces of glue has the thickness of 3.5-6mm, and has high production efficiency and less loss compared with the existing steel plate conveying belt which needs three to five times of coating attachment.
Detailed Description
The invention is further illustrated by the following specific examples, wherein the PU glue used in each example is prepared by a conventional method, the TPU is Huafeng 3890, and the silicon sulfide modified TPU thermoplastic resin, Dow Corning 3040, unless otherwise specified.
Example 1:
the steel plate conveying belt for conveying the metal plate is prepared by the following steps:
(1) the high-strength fabric framework consists of warps and wefts, wherein the warps consist of polyarylate liquid crystal fibers and polyester fibers, the polyarylate liquid crystal fibers account for 20%, and the wefts consist of polyester monofilaments;
(2) coating PU glue on two surfaces of the high-strength fabric framework, and drying to obtain the high-strength fabric framework coated with the PU glue;
(3) uniformly mixing 100 parts of foamed TPU particles with the diameter of 3-5mm and 10 parts of solvent-free bi-component polyurethane glue at 60 ℃, coating the high-strength fabric skeleton coated with the PU glue prepared in the step (2) by using a scraper within 3min, baking the high-strength fabric skeleton coated with the PU glue by an oven at the temperature of 120 ℃ for 10min, slightly drying the surface of the high-strength fabric skeleton, cooling the high-strength fabric skeleton coated with the PU glue to 40 ℃, pressing the high-strength fabric skeleton to the thickness of 3mm by using a double-roller pressing machine, sticking a layer of release paper or PE film on the surface of the high-strength fabric skeleton, rolling the high-strength fabric skeleton to be completely solidified to obtain the lower half part of a conveying;
(4) extruding a TPU coating layer on the high-strength fabric framework coated with the PU glue prepared in the step (2), wherein the thickness of the coating layer is 0.1 mm; extruding a silicon sulfide modified TPU thermoplastic resin coating on the TPU coating to obtain the upper half part of the conveyer belt, wherein the thickness of the coating is 0.1 mm;
(5) and (4) coating solvent-free bi-component polyurethane glue on the surface of the foamed coating on the lower half part of the conveyer belt prepared in the step (3) by using a scraper, baking for 1min at the temperature of 80 ℃ by using an oven, attaching the solvent-free bi-component polyurethane glue to the surface of the fabric on the upper half part of the conveyer belt prepared in the step (4), pressing to the required thickness by using a double-roller tabletting machine, cooling to 40 ℃ by using a coating cold water roller, and rolling to obtain the conveyer belt with two pieces of glue, wherein the thickness of the conveyer belt is 3.
The solvent-free two-component polyurethane glue used in this example was CN107459960A the solvent-free two-component polyurethane glue prepared in example 1.
Comparative example 1:
coating PU glue on a common polyester fabric, drying, extruding a TPU coating, repeating for three times, and attaching to obtain a three-cloth three-glue conveying belt with the thickness of 3.5 mm.
Example 2:
the conveyer belt for conveying the metal plates of the embodiment is prepared by the following steps:
(1) the high-strength fabric framework consists of warps and wefts, wherein the warps consist of polyarylate liquid crystal fibers and polyester fibers, the polyarylate liquid crystal fibers account for 40%, and the wefts consist of polyester monofilaments;
(2) coating PU glue on two surfaces of the high-strength fabric framework, and drying to obtain the high-strength fabric framework coated with the PU glue;
(3) uniformly mixing 100 parts of foamed TPU particles with the diameter of 3-5mm and 40 parts of solvent-free bi-component polyurethane glue at 80 ℃, coating the high-strength fabric skeleton coated with the PU glue prepared in the step (2) by using a scraper within 4min, baking the high-strength fabric skeleton coated with the PU glue in an oven at 100 ℃ for 5min, slightly drying the surface of the high-strength fabric skeleton, coating a cold water roller, cooling the high-strength fabric skeleton to 50 ℃, performing double-roller tabletting and pressing the high-strength fabric skeleton to the thickness of 4mm, coating a layer of release paper or PE film on the surface of the high-strength fabric skeleton, rolling the high-strength fabric skeleton to be completely solidified to obtain the lower half part of a conveying belt, removing the;
(4) extruding a TPU coating layer on the high-strength fabric framework coated with the PU glue prepared in the step (2), wherein the thickness of the coating layer is 0.5 mm; extruding a silicon sulfide modified TPU thermoplastic resin coating on the TPU coating to obtain the upper half part of the conveyer belt, wherein the thickness of the coating is 0.1 mm;
(5) and (4) coating solvent-free bi-component polyurethane glue on the surface of the foamed coating of the lower half part of the conveyer belt prepared in the step (3) by using a scraper, baking for 1.5min at the temperature of 100 ℃ by using an oven, attaching the solvent-free bi-component polyurethane glue to the surface of the fabric of the upper half part of the conveyer belt prepared in the step (4), performing double-roller tabletting and pressing to obtain the required thickness, cooling the coated cold water roller to 50 ℃, and rolling to obtain the conveyer belt with two pieces of cloth and two pieces of glue, wherein the thickness is 5.
The solvent-free two-component polyurethane glue used in this example was CN107459960A the solvent-free two-component polyurethane glue prepared in example 2.
Comparative example 2:
coating PU glue on a common polyester fabric, drying, extruding a TPU coating, repeating for three times, and attaching to obtain a three-cloth three-glue conveying belt with the thickness of 5 mm.
Example 3:
the conveyer belt for conveying the metal plates of the embodiment is prepared by the following steps:
(1) the high-strength fabric framework consists of warps and wefts, wherein the warps consist of polyarylate liquid crystal fibers and polyester fibers, the polyarylate liquid crystal fibers account for 50%, and the wefts consist of polyester monofilaments;
(2) coating PU glue on two surfaces of the high-strength fabric framework, and drying to obtain the high-strength fabric framework coated with the PU glue;
(3) uniformly mixing 100 parts of foamed TPU particles with the diameter of 3-6mm and 50 parts of solvent-free bi-component polyurethane glue at 70 ℃, coating the high-strength fabric skeleton coated with the PU glue prepared in the step (2) by using a scraper within 10min, baking the high-strength fabric skeleton coated with the PU glue by an oven at the temperature of 120 ℃ for 10min, slightly drying the surface of the high-strength fabric skeleton, cooling the high-strength fabric skeleton coated with the PU glue to 60 ℃, performing double-roller tabletting and pressing the high-strength fabric skeleton to the thickness of 4.5mm, coating a layer of release paper or PE film on the surface of the high-strength fabric skeleton, rolling the high-strength fabric skeleton to be completely solidified to obtain the lower half part of a conveying belt;
(4) extruding a TPU coating layer on the high-strength fabric framework coated with the PU glue prepared in the step (2), wherein the thickness of the coating layer is 0.5 mm; extruding a silicon sulfide modified TPU thermoplastic resin coating on the TPU coating to obtain the upper half part of the conveyer belt, wherein the thickness of the coating is 0.1 mm;
(5) and (4) coating solvent-free bi-component polyurethane glue on the surface of the foamed coating on the lower half part of the conveyer belt prepared in the step (3) by using a scraper, baking for 2min at the temperature of 120 ℃ by using an oven, attaching the solvent-free bi-component polyurethane glue to the surface of the fabric on the upper half part of the conveyer belt prepared in the step (4), pressing to the required thickness by using a double-roller tabletting machine, cooling to 60 ℃ by using a coating cold water roller, and rolling to obtain the conveyer belt with two pieces of glue, wherein the thickness of the conveyer belt is 5.
The solvent-free two-component polyurethane glue used in this example was CN107459960A the solvent-free two-component polyurethane glue prepared in example 3.
Comparative example 3:
coating PU glue on a common polyester fabric, drying, extruding a TPU coating, repeating for four times, and attaching to obtain a four-cloth four-glue conveying belt with the thickness of 5.5 mm.
Results of performance testing of examples and comparative examples (comparative example is a belt of the same thickness) are shown in Table 1
TABLE 1
The scratch resistance in table 1 is detected according to GMW14688-A and load of 20N, and the result is tested by a color difference meter to test the size of delta L before and after the experiment, wherein the smaller the difference value of delta L is, the more scratch resistant the test is;
in addition, the single-layer peel strength, 1% tensile strength and abrasion in Table 1 were tested according to GB/T6759-2013, GB/T3690-2017 and ISO 5470, respectively.
Claims (9)
1. The utility model provides a steel sheet conveyer belt for sheet metal carries, its characterized in that, this steel sheet conveyer belt is two glued structures of two cloths, includes the conveyer belt upper segment portion and the conveyer belt lower segment portion that form by the laminating of solvent-free bi-component polyurethane glue, wherein conveyer belt upper segment portion adopts the high strength fabric skeleton, TPU coating and the compound TPU thermoplastic resin coating that modifies of silicon sulfide of coating PU glue to form, conveyer belt lower segment portion adopts the high strength fabric skeleton and the foaming coating complex of coating PU glue to form.
2. The steel plate conveyor belt for metal plate conveying according to claim 1, wherein the high strength fabric frame is composed of warp and weft, wherein the warp is composed of polyarylate liquid crystal fiber and polyester fiber, the content of polyarylate liquid crystal fiber is 20 to 50% of the content of the warp, and the weft is composed of polyester monofilament.
3. The steel plate conveyor belt for conveying metal plates as claimed in claim 1, wherein the coating thickness of the TPU coating is 0.1-0.5 mm.
4. The steel plate conveyor belt for metal plate conveying of claim 1, wherein said silicon sulfide modified TPU thermoplastic resin coating thickness is 0.1 mm.
5. The steel plate conveyor belt for conveying metal plates as claimed in claim 1, wherein the foamed coating layer is formed by mixing foamed TPU particles with solvent-free bi-component polyurethane glue and then coating the mixture on the high-strength fabric framework of the primer PU glue for foaming and calendering.
6. The steel plate conveyor belt for conveying metal plates as claimed in claim 1, wherein the foamed TPU particles are 100 parts, and the solvent-free two-component polyurethane glue is 10 to 50 parts.
7. A steel plate conveyor belt for conveying metal plates according to claim 1, wherein said conveyor belt has a thickness of 3.5-6 mm.
8. The method of manufacturing a steel plate conveyor belt for metal plate transportation according to any one of claims 1 to 7, comprising the steps of:
(1) coating PU glue on two surfaces of the high-strength fabric framework, and drying to obtain the high-strength fabric framework coated with the PU glue for later use;
(2) uniformly mixing foamed TPU particles and solvent-free bi-component polyurethane glue under the heating condition, coating the mixture on the high-strength fabric skeleton coated with the PU glue prepared in the step (1) by using a scraper within a certain time, baking the mixture by using an oven until the surface is slightly dried, then coating a cold water roller, cooling the mixture to 40-60 ℃, calendering the mixture to the thickness of 3-5mm by using a double-roller tablet press, coating a layer of release paper or PE film on the surface, rolling the mixture until the mixture is completely cured to obtain the lower layer part of the conveying belt, and then removing the release paper or the PE film;
(3) extruding a TPU coating layer on the high-strength fabric framework coated with the glue prepared in the step (1), and extruding a silicon sulfide modified TPU thermoplastic resin coating layer on the outer surface of the TPU coating layer to obtain an upper layer part of the conveying belt;
(4) coating solvent-free bi-component polyurethane glue on the surface of the foaming coating layer on the lower part of the conveyer belt prepared in the step (2) by using a scraper, baking the foaming coating layer in an oven at the temperature of 80-120 ℃ for 1-2min, attaching the foaming coating layer to the surface of the fabric on the upper part of the conveyer belt prepared in the step (3), pressing the fabric to the required thickness by using a double-roller tabletting machine, cooling the coating cold water roller to 40-60 ℃, and rolling the coating cold water roller to obtain the conveyer belt with two pieces of cloth and two pieces of glue.
9. The method for manufacturing a steel plate conveyor belt for metal plate transportation of claim 8, wherein in the step (2), the heating condition is 60-100 ℃; the certain time is 3-10 min; the temperature of the oven is controlled to be 80-120 ℃, and the baking time is 1-10 min.
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| CN113478938A (en) * | 2021-07-23 | 2021-10-08 | 上海永利带业股份有限公司 | Preparation method of solvent-free high-stripping TPU light conveyor belt |
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