Method for producing composite layer base material of carpet sound insulating mat for automobile
A production method and technology of sound-insulating pads, which are applied in the field of production of composite layer substrates for automotive carpet sound-insulating pads, can solve problems such as increased mold costs and changes in material surface morphology, and achieve good bending resistance, increased bonding strength, and avoid The effect of investing in building
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Embodiment 1
[0015] Embodiment 1: A kind of production method of the base material of composite layer of carpet sound-insulating mat for automobiles of the present invention adopts the following process steps:
[0016] The EPDM surface blanket among the present invention is prepared by reclaimed materials, and the main component is EPDM reclaimed fragments purchased from the market, with a tear strength > 100N; The weight percent concentration of the butadiene rubber solution is 40%, and the chloroprene rubber has a certain degree of ductility, and the oil resistance and heat resistance are also relatively outstanding.
[0017] Properly clean the surface of the EPDM blanket with water to remove the dust and grease on the surface during production and transportation. After the water evaporates and dries up, emboss on the surface of EPDM rubber to form lines, the lines are square, and the bonding area to be bonded is polished with a grinding wheel; the neoprene solution is evenly sprayed on ...
Embodiment 2
[0019] When the temperature is low, chloroprene rubber with a certain polarity can only be bonded to the surface of EPDM mainly by van der Waals force. The EPDM used in the present invention is a recycled material with certain plasticity, so after it is heated to a temperature close to the melting temperature or a processable temperature, the long molecular chains in the neoprene adhesive can penetrate into the EPDM base material, which is expected to increase Adhesion of EPDM layer. In this example, the same sample preparation method as in Example 1 was adopted, and the adhesive was Tai A stick DC7000 neoprene solution, and the weight percent concentration of the neoprene solution was 40%. The glue spraying density reaches about 70.8g / m2, and the amount of neoprene glue applied is: 0.005~0.3mg / mm2; let it dry for 2.5 minutes, let the solvent fully evaporate, and the neoprene glue can reach the maximum bonding ability. Use a pressure of 0.01-0.02MPa to apply pressure to the b...
Embodiment 3
[0021] In this example, the same sample preparation method as in Examples 1 and 2 was adopted, and the adhesive was Tai A stick DC7000 neoprene solution, and the weight percent concentration of the neoprene solution was 40%. Evenly spray the formulated adhesive neoprene solution on the EPDM surface blanket to be bonded. In this example, the spray density is about 69.1g / m2, and the application of the neoprene solution The amount is: 0.005~0.3mg / mm2. Leave it in the air for 3 minutes to allow the solvent to fully evaporate, and the bonding ability of the neoprene will reach the maximum. Finally, stick two pieces of EPDM blankets coated with glue together, and apply a pressure of 0.01 to 0.02 MPa to the bonded part for 25 seconds to remove the air between the bonded layers and ensure the bonded surface is secure. Good fit. According to the principle of time-temperature equivalence, the effect of increasing the drying temperature is the same as increasing the drying temperature....
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Abstract
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