The present invention belongs to the technical field of pharmaceutical packaging, and provides a composition for preparing a packaging bottle. The packaging bottle comprises a bottle body and a bottle cap. The bottle body is made of the following raw materials in parts by weight: 90–100 parts of heat-resistant homopolypropylene resin, 5–10 parts of impact-resistant copolymer polypropylene resin, 0.5–1 part of a structure stabilizer, 0.5–2 parts of maleic anhydride-grafted polypropylene resin and 1–3 parts of a polyolefin elastomer. The bottle cap is made of the following raw materials in parts by weight: 95–100 parts of impact-resistant copolymer polypropylene resin and 5–10 parts of color masterbatch. The packaging bottle prepared by the present invention has high light transmittance, the bottle cap and the bottle body can be tightened with a small torque during relative screwing, and has good air tightness. Meanwhile, a large torque is required to cause thread slipping between the bottle cap and the bottle body during relative screwing, thereby improving the yield in the packaging process. In addition, the present invention also provides a packaging bottle and a preparation method thereof.

Country Code: CN

Application Number: CN202410303216.9