A bonding method for PET substrate functional sheets

Abstract

The invention discloses a PET (polyethylene terephthalate) substrate and application thereof and a PET functional plate lamination method. The PET substrate comprises PET resin, a PVC (polyvinyl chloride) cold-resistant softening agent and a maleic anhydride grafting compatilizer in a mass ratio of 70-90:1-3:2-5. The PET substrate is applied to a capacitive touch screen to serve as a PET functional plate. The method for lamination of the PET functional plate to the capacitive touch screen includes: S1, using the PET substrate for preparing the PET functional plate, and storing in a 35DEG C high-temperature electric warm box for standby application; S2, keeping the temperature of a low-temperature thermostatic chamber to be 10 DEG C, putting a glass cover plate in the low-temperature thermostatic chamber to reach room temperature thermal expansion and cold contraction indexes; keeping for standby application; S3, taking out the PET functional plate from the high-temperature electric warm box, and quickly laminating the PET functional plate and the cover plate on a lamination equipment in the low-temperature thermostatic chamber.

Description

technical field [0001] The invention relates to the technical field of mobile phones, in particular to a bonding method of a PET base material functional sheet. Background technique [0002] At present, the capacitive touch screen is composed of a glass cover plate and a functional sheet of a PET film. The capacitive touch screen technology uses the current induction of the human body to work. The ambient temperature of the capacitive screen is required to be 0-35°C. When the environmental electric field changes, when the capacitive screen exceeds the low temperature threshold, it is easy to cause the capacitive screen to drift, resulting in inaccurate touch control, and in severe cases, no touch response. Specifically, when the ambient temperature is lower than 0°C, the performance of the traditional PET base material at low temperature becomes poor. Due to the difference in the thermal expansion and contraction coefficients of the two materials, the PET function is extreme...

AI Technical Summary

Problems solved by technology

[0002] At present, the capacitive touch screen is composed of a glass cover plate and a functional sheet of a PET film. The capacitive touch screen technology uses the current induction of the human body to work. The ambient temperature of the capacitive screen is required to be 0-35°C. The electric field of the environment changes, and when the capacitive screen exceeds the threshold of low temperature, it is easy to cause the drift of the capacitive screen, resulting in inaccurate touch, and in severe cases, no response to touch

Specifically, when the ambient temperature is lower than 0°C, the performance of the traditional PET base material at low temperature becomes poor. Due to the difference in the thermal expansion and contraction coefficients of the two materials, the PET function is extremely cold. The chip is squeezed by a small amount of shrinkage after the glass is cold-shrinked, and the circuit of the functional chip is dense.

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