| CPC C09J 11/04 (2013.01) [B29B 7/007 (2013.01); B29B 7/40 (2013.01); B29B 9/12 (2013.01); B29C 35/0805 (2013.01); B29C 37/0025 (2013.01); B29C 48/022 (2019.02); B29C 48/04 (2019.02); B29C 48/154 (2019.02); B29C 48/252 (2019.02); C09J 5/02 (2013.01); C09J 11/06 (2013.01); C09J 111/00 (2013.01); B29C 2035/0827 (2013.01); B29K 2011/00 (2013.01); B29K 2105/0005 (2013.01); B29K 2105/251 (2013.01); B29K 2509/00 (2013.01); B29L 2031/707 (2013.01); C08K 2003/3045 (2013.01); C08K 5/098 (2013.01); C09J 2400/10 (2013.01); C09J 2400/20 (2013.01); C09J 2411/00 (2013.01)] | 5 Claims |
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1. A process for improvement treatment of a polyester cord and a rubber adhesive, comprising the following steps:
S1: extruding chloroprene rubber into particles with a particle size of ≤0.08 cm by spiral stirring, and controlling the temperature of the stirring process at 30-40° C., stirring and extruding until the discharge time of the particles is 1 min, so as to obtain chloroprene rubber particles;
S2: extruding chloroprene rubber particles by spiral stirring, and adding calcined gypsum powders accounting for 0.05-0.1% of the mass of chloroprene rubber, calcium stearate accounting for 0.1-0.8% of the mass of chloroprene rubber and an anti-aging agent accounting for 1-3% of the mass of chloroprene rubber before opening of spiral stirring, extruding by opening spiral stirring, controlling the temperature at 80-100° C., and then forming particles with a particle size of ≤0.5 cm after stirring and extruding for 0.5-1 min, so as to obtain coarse rubber particles;
S3: mixing the coarse rubber particles with a solvent in a mass ratio of 1:5-7 and uniformly stirring, so as to obtain a modified rubber adhesive;
S4: irradiating a polyester cord at a distance of 10 cm using a 30 W UV lamp at the irradiation temperature of 25-30° C., so as to obtain a UV modified polyester cord;
S5: compounding the modified rubber adhesive onto the UV modified polyester cord under 80-100 g/cm2 by using a mode of brushing, spraying or dipping, so as to obtain a compounded sheet; and
S6: performing baking treatment on the compounded sheet at the temperature of 50-60° C. for at least 10 min;
wherein, the anti-aging agent is a composite formed by mixing paraffin with an anti-aging agent 3100 in a mass ratio of 0.1-0.5:1;
the solvent is formed by adding 0.01-0.1 kg of gasoline and 0.1-0.5 kg of gutter oil into 1 kg of ethyl acetate;
the calcined gypsum powders are powders obtained by directly calcining phosphogypsum for 20-30 min at 800-1000° C. and then performing ball milling with a ball mill and screening via a 300-mesh sieve;
the following devices are used in the process, which include an extrusion modification component, a stirring and mixing component, and a compounding modification component, the bottom of the extrusion modification component is provided with a second rack (2), and the bottom of the compounding modification component is provided with a first rack (1), the first rack (1) and the second rack (2) are integrally formed, and the extrusion modification component includes feed components, an extrusion modification cylinder, a third motor (17), a spiral extrusion component and a discharge plate (33); the discharge plate (33) is arranged at the right end of the extrusion modification cylinder, the spiral extrusion component is arranged inside the extrusion modification cylinder, the feed components are arranged on the top of the extrusion modification cylinder close to the left end, the third motor (17) is located at the left end of the extrusion modification cylinder, the third motor (17) is connected with the spiral extrusion component, and two feed components are arranged on the extrusion modification cylinder from left to right; the bottom of the stirring and mixing component is provided with a rubber leaking tube (9), and the compounding modification component includes a compounding box (4), the top of the compounding box (4) is sequentially provided with a UV light plate (6), a rubber sizing and compounding plate (7) and a drying plate (10), the center of the rubber sizing and compounding plate (7) is provided with a rubber sizing plate (24), and the rubber leaking tube (9) is communicated with the rubber sizing plate (24), and the right end of the extrusion modification cylinder extends into the stirring and mixing component;
the extrusion modification cylinder includes a first extrusion portion (19) and a second extrusion portion (23), the first extrusion portion (19) and the second extrusion portion (23) are integrally formed, and both the first extrusion portion (19) and the second extrusion portion (23) are provided with two layers of cavities from inside to outside, the cavity in the inner layer is an extrusion cavity, and the cavity in the outer layer is a heat exchange cavity (35); the extrusion cavity located in the first extrusion portion (19) is internally provided with a first spiral shaft (38), the extrusion cavity located in the second extrusion portion (23) is internally provided with a second spiral shaft (34), and an extrusion plate (36) is arranged between the extrusion cavity located in the first extrusion portion (19) and the extrusion cavity located in the second extrusion portion (23), the extrusion plate (36) is provided with several extrusion holes where materials are extruded and pass: the right end of the extrusion cavity located in the second extrusion portion (23) is provided with a discharge plate (33), and the discharge plate (33) is provided with several discharge holes where the materials are extruded and pass; the first spiral shaft (38) and the second spiral shaft (34) are integrally formed, and the extrusion plate (36) passes through a connection point between the first spiral shaft (38) and the second spiral shaft (34); the left end of the first spiral shaft (38) passes through the extrusion cavity located in the first extrusion portion (19) to be connected with the third motor (17); the right end of the second spiral shaft (34) passes through the discharge plate (33), and the end portion of the right end of the second spiral shaft (34) is provided with a fixing nut (39); the heat exchange cavity is provided with a liquid inlet (20) and a liquid outlet (32) communicating the inside of the heat exchange cavity with the outside of the heat exchange cavity; the first extrusion portion (19) is provided with a first hopper (18) capable of feeding materials into the extrusion cavity located inside the first extrusion portion (19), and the second extrusion portion (23) is provided with a second hopper (21) capable of feeding materials into the extrusion cavity located inside the second extrusion portion (23);
the extrusion plate (36) and the outer wall of the extrusion modification cylinder are tightly fixed by using fixing bolts (37);
when in use, chloroprene rubber is spirally stirred and extruded through a spiral extrusion component in the first extrusion portion (19), and then discharged into the second extrusion section (23) under the action of the extrusion plate (36), meanwhile at least one of the calcined gypsum powders, calcium stearate and anti-aging agent is added into the second extrusion section (23) for a secondary spiral stirring and extrusion so as to achieve the secondary spiral stirring and extrusion modification of chloroprene rubber, then, the coarse rubber particles are discharged into the mixing and stirring component through the discharge plate (33) for mixing and modification, thereby ensuring the bonding strength of the rubber adhesive after being compounded with the polyester cord, and improving the bonding strength of the rubber adhesive on the polyester cord, which reaches over 20 N/cm.
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