CN109230212B - Temperature-resistant TPU light conveyor belt and manufacturing method thereof - Google Patents
Temperature-resistant TPU light conveyor belt and manufacturing method thereof Download PDFInfo
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- CN109230212B CN109230212B CN201811048044.6A CN201811048044A CN109230212B CN 109230212 B CN109230212 B CN 109230212B CN 201811048044 A CN201811048044 A CN 201811048044A CN 109230212 B CN109230212 B CN 109230212B
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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
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Abstract
The invention discloses a temperature-resistant TPU light conveyor belt and a manufacturing method thereof, the temperature-resistant TPU light conveyor belt sequentially comprises a fabric layer, a bonding layer and a surface layer, the bonding layer is of a double interpenetrating network structure formed by solidifying nanocellulose, aqueous TPU glue and a curing agent, the temperature-resistant TPU light conveyor belt is manufactured through an extrusion calendering process, the strength of the aqueous TPU glue is increased under the condition that the processing performance and other mechanical properties of the TPU light conveyor belt are not influenced, the aqueous TPU glue is prevented from aging and cracking, simultaneously, the temperature-resistant TPU light conveyor belt conforms to the food sanitation standard of the American FDA and the REACH regulation of the European Union, is safe and environment-friendly, and is a durable conveying product for the food industry.
Description
Technical Field
The invention belongs to the technical field of conveyer belt manufacturing, and particularly relates to a temperature-resistant TPU light conveyer belt and a manufacturing method thereof.
Background
At present, a TPU light conveying belt generally takes polyester fabric as a framework material and is mainly used for conveying light and medium-weight materials, and the TPU light conveying belt is widely used in the industries of food processing, tobacco and the like due to the advantages of light weight, long service life, convenience in installation, difficulty in friction and the like. In the food baking industry, the existing TPU conveying belt runs under a long-term high-temperature environment, the bonding layer is easy to age and lose efficacy, and the TPU surface layer is separated from the framework material, so that the method for manufacturing the temperature-resistant TPU conveying belt has important significance for the food baking industry. The nano-cellulose is a water-soluble material, and can form a sponge-like three-dimensional network structure after being dissolved in water and dried, the strength of the structure cannot be changed along with the rise of temperature, and the structure can be carbonized and disintegrated only after reaching the critical temperature, and no report related to the application of the nano-cellulose to a TPU conveying belt exists at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the temperature-resistant TPU light conveyor belt and the manufacturing method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the temperature-resistant TPU light conveyor belt sequentially comprises a fabric layer, a bonding layer and a surface layer; wherein the content of the first and second substances,
the fabric layer is a PET framework;
the surface layer is a TPU surface layer;
the bonding layer is a double interpenetrating network structure formed by curing nanocellulose, water-based TPU glue and a curing agent.
Preferably, the mass ratio of the nano-cellulose to the aqueous TPU glue to the curing agent is 10-30:2: 1.
More preferably, the mass ratio of the nano-cellulose to the aqueous TPU glue to the curing agent is 20:2: 1.
Preferably, the curing agent is an aliphatic isocyanate.
The manufacturing method of the temperature-resistant TPU light conveyor belt specifically comprises the following steps:
s1: adding the nanocellulose and the curing agent into the water-based TPU glue and uniformly stirring; wherein, the stirring time is 10-20min, and the stirring speed is 400-;
s2: coating the glue mixed in the step S1 on the surface of one side of the fabric layer, and drying the fabric layer through an infrared heating oven; wherein the coating amount is 80-120g/m2The drying temperature is 100-120 ℃.
S3: gluing the side, coated with the glue, of the composite layer dried in the step S2 with the TPU surface layer, extruding, calendering and compounding, and cooling to obtain the TPU surface layer; wherein the extrusion temperature is 180-190 ℃, the extrusion pressure is 10-15Pa, and the cloth surface temperature of the fabric layer is 120-130 ℃ in the extrusion calendering compounding process.
Preferably, in step S1, the stirring time is 15min, and the stirring rotation speed is 500 r/min.
Preferably, in step S2, the coating amount is 100g/m2The drying temperature was 110 ℃.
Preferably, in step S3, the extrusion temperature is 185 ℃ and the extrusion pressure is 12 Pa.
Preferably, in step S3, the cloth cover temperature of the fabric layer is 125 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the binder is water-based TPU glue, is safe and environment-friendly, meets the requirement of food grade, and can be used in the food industry.
2. The nano-cellulose has small addition amount, good compatibility with water-based TPU glue and no influence on the processing performance and other mechanical properties of the TPU light conveyor belt; when the water-based TPU glue is aged and cracked at high temperature, the nano cellulose is added, and the nano cellulose network wraps the water-based TPU glue, so that the strength of the water-based TPU glue is increased, and the water-based TPU glue is prevented from being aged and cracked.
3. The temperature-resistant TPU light conveying belt completely meets the American FDA food sanitation standard and the European Union REACH regulation, and is a durable conveying product for the food industry.
Drawings
FIG. 1 is a schematic structural diagram of a double interpenetrating network formed by nanocellulose and aqueous TPU glue according to the present invention;
FIG. 2 is a schematic structural diagram of the aqueous TPU glue at high temperature after aging and cracking and the addition of nanocellulose.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following embodiments.
The manufacturing method of the temperature-resistant TPU light conveyor belt comprises the following steps: adding 10% of nano-cellulose and 5% of curing agent into the water-based TPU glue, and stirring for 10-20min at the stirring speed of 400-600 r/min; coating the mixed glue on one side surface of the fabric layer, wherein the coating amount is 80-120g/m2Drying the mixture by an infrared heating oven at the temperature of 100-; then, adhering one side of the dried composite layer coated with the glue to the TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 180-190 ℃ and the extrusion pressure is 10-15Pa, and cooling to obtain the TPU surface layer; the cloth surface temperature of the fabric layer in the extrusion calendering compounding process is 120-130 ℃.
Example 1
Preparing a temperature-resistant TPU light conveying belt according to the structure and the material shown in the table 1; adding 10% of nano-cellulose and 5% of curing agent into the water-based TPU glue, and stirring for 15min at a stirring speed of 500 r/min; coating the mixed glue on one side surface of the PET polyester fabric layer, wherein the coating amount is 100g/m2Drying by an infrared heating oven at 100 ℃; then, adhering the side, coated with glue, of the dried composite layer to a TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 185 ℃ and the extrusion pressure is 10Pa, and cooling to obtain the TPU surface layer; the cloth cover temperature of the fabric layer in the extrusion calendering compounding process is 125 ℃.
Comparative example 1
Preparing a TPU light conveying belt according to the structure and the material shown in the table 1; coating water-based TPU glue on one side surface of a PET polyester fabric layer, wherein the coating amount is 100g/m2Drying by an infrared heating oven at 100 ℃; then polymerizing the PETAdhering one side of the ester fabric coated with the glue to a TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 185 ℃ and the extrusion pressure is 10Pa, and cooling to obtain the polyester fiber reinforced thermoplastic polyurethane; the cloth cover temperature of the PET polyester fabric in the extrusion calendering compounding process is 125 ℃.
TABLE 1
Example 2
The manufacturing method of the temperature-resistant TPU light conveyor belt comprises the following steps: adding 10% of nano-cellulose and 5% of curing agent into the water-based TPU glue, and stirring for 10min at the stirring speed of 400 r/min; coating the mixed glue on the surface of one side of the PET polyester fabric layer, wherein the coating amount is 80g/m2Drying by an infrared heating oven at 100 ℃; then, adhering the side, coated with glue, of the dried composite layer to a TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 180 ℃ and the extrusion pressure is 10Pa, and cooling to obtain the TPU surface layer; the cloth cover temperature of the PET polyester fabric layer in the extrusion calendering compounding process is 120 ℃.
Example 3
The manufacturing method of the temperature-resistant TPU light conveyor belt comprises the following steps: adding 10% of nano-cellulose and 5% of curing agent into the water-based TPU glue, and stirring for 20min at a stirring speed of 600 r/min; coating the mixed glue on one side surface of the PET polyester fabric layer, wherein the coating amount is 120g/m2Drying by an infrared heating oven at 120 ℃; then, adhering the side, coated with glue, of the dried composite layer to a TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 190 ℃ and the extrusion pressure is 15Pa, and cooling to obtain the TPU surface layer; the cloth cover temperature of the fabric layer in the extrusion calendering compounding process is 130 ℃.
The peel strength tests were performed on the temperature-resistant TPU light-weight conveyor belts prepared in examples 1 to 3 and the TPU light-weight conveyor belt prepared in comparative example 1 at 25 ℃, 55 ℃ and 85 ℃, respectively, and the test standard was "test method for interlayer adhesion strength of conveyor belts in GB/T6759-2013", and the test results are shown in table 2.
TABLE 2
As can be seen from table 2, the peel strength of the conveyor belt decreased with increasing temperature, because the adhesive layer of the conveyor belt was easily aged and failed in a high temperature environment, causing the TPU surface layer to separate from the frame material; compared with the comparative example 1, after the nanocellulose is added in the examples 1 to 3, the peel strength of the bonding layer at high temperature is far greater than the ground ratio 1, which further shows that the strength of the bonding layer at high temperature is ensured by a double interpenetrating network formed after the nanocellulose is added in the bonding layer of the TPU conveyer belt and cured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention should not be limited by the disclosure of the preferred embodiments. Therefore, it is intended that all equivalents and modifications which do not depart from the spirit of the invention disclosed herein are deemed to be within the scope of the invention.
Claims (1)
1. The temperature-resistant TPU light conveyor belt is characterized by sequentially comprising a fabric layer, a bonding layer and a TPU surface layer;
the fabric layer is a PET framework, and the bonding layer is a dual interpenetrating network structure formed by curing nanocellulose, aqueous TPU glue and a curing agent;
the manufacturing method of the temperature-resistant TPU light conveyor belt comprises the following steps: adding 10% of nano-cellulose and 5% of curing agent into water-based TPU glue, stirring for 15min at the stirring speed of 500r/min, and coating the mixed glue on the surface of one side of a PET polyester fabric layer, wherein the coating amount is 100g/m2Drying the composite layer by an infrared heating oven at 100 ℃, attaching the side of the dried composite layer coated with glue to a TPU surface layer, extruding, calendering and compounding under the conditions that the extrusion temperature is 185 ℃ and the extrusion pressure is 10Pa, and cooling the fabric surface of the fabric layer at 125 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092174A1 (en) * | 2008-01-23 | 2009-07-30 | Habasit Ag | Conveyor device having antistatic conveyor belt |
| CN104326212A (en) * | 2014-10-23 | 2015-02-04 | 艾艾精密工业输送系统（上海）股份有限公司 | Conveying belt capable of reducing lateral side fuzz amount generation and preparing method of conveying belt |
| CN107498961A (en) * | 2017-07-31 | 2017-12-22 | 平湖市新保纺织科技有限公司 | A kind of waterproof antifriction composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107987777B (en) * | 2017-12-05 | 2020-08-11 | 南京工程学院 | Polyurethane emulsion adhesive containing nano-cellulose whiskers and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092174A1 (en) * | 2008-01-23 | 2009-07-30 | Habasit Ag | Conveyor device having antistatic conveyor belt |
| CN104326212A (en) * | 2014-10-23 | 2015-02-04 | 艾艾精密工业输送系统（上海）股份有限公司 | Conveying belt capable of reducing lateral side fuzz amount generation and preparing method of conveying belt |
| CN107498961A (en) * | 2017-07-31 | 2017-12-22 | 平湖市新保纺织科技有限公司 | A kind of waterproof antifriction composite material |
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