The invention belongs to the field of
polymer composite materials, in particular relating to a PP / PET
alloy material and preparation process thereof. The PP / PET
alloy material is prepared from the following raw materials by weight percentage: 60 to 90 percent of PP / PET composite materials, 3 to 9 percent of compatibilizers, 6 to 30 percent of reinforcing agent, 0.5 to 6 percent of
coupling agent, and 0 to 1 percent of
antioxidant. The preparation process comprises the steps of
drying, mixing, extruding, stretching and drawing and cooling and granulating. In the method, waste PP / PET composite films and / or PP / PET non-woven fabrics, serving as main raw materials, are added with a composite compatibilizer to promote the PP and PET to be compatible on the
molecular level; the
coupling agent and reinforcing agent can effectively improve the mechanical properties of the PP / PET composite materials; and the prepared PP / PET
alloy material has a
flexural modulus up to 1,900 MPa, good bending properties and high
impact strength up to 120J / M, can be widely used for molding the plastic parts of electric appliances, toys and car parts; and in addition, the waste PP / PET composite films and / or PP / PET non-woven fabrics are adopted as main raw materials, so environment
pollution is reduced greatly, and the purpose of changing waste into valuable is fulfilled.