China Plastics ›› 2025, Vol. 39 ›› Issue (5): 95-100.DOI: 10.19491/j.issn.1001-9278.2025.05.015

• Plastic and Environment • Previous Articles     Next Articles

Preparation and performance of ultra⁃thin fully biodegradable water⁃permeable mulching films

YAO Jianmin1,2(), BI Xinyuan2(), LI Ruizhen2, YAO Yuanyuan1,3, LIU Zhao1,4, YANG Ruiping1,2, JIANG Lina5   

  1. 1.Shanxi Weitong Water?Permeable Membrane Biotechnology Co,Ltd,Taiyuan 030006,China
    2.College of Agricultural Economics and Management,Shanxi Agricultural University,Taiyuan 030006,China
    3.Shanxi Polytechnic College,Taiyuan 030006,China
    4.College of Horticulture,Shanxi Agricultural University,Taiyuan 030006,China
    5.Qinxian Agricultural Technology Extension Center,Changzhi 046400,China
  • Received:2024-07-01 Online:2025-05-26 Published:2025-05-22

Abstract:

A ultra⁃thin fully biodegradable water permeable mulching film with a thickness of 0.006 mm±0.000 2 mm was developed by combining polycarbonate propylene, polybutylene adipate terephthalate, anti⁃aging polycarbonate propylene ester, strong coupling water permeable auxiliary agent, and anti⁃UV agent, and its blowing temperature and processing conditions were optimized. The results of performance analysis indicated that the longitudinal/transverse tensile load, breaking nominal strain, and right⁃angle tearing load of the film was 2.92 N/1.90 N, 195 %/522 %, and 0.9 N/1.1 N, respectively. Its safe and effective service life was greater than 86 d, and its water vapor permeability was lower than 370 g/(m2·24 h). All these indicators could meet the performance requirements for 0.01 mm film according to the national standard GB/T 35795—2017. In addition, the film had a function of air permeability and water permeability with an air permeability rate of 60 s/(23 ℃·100 mm·100 mm·20 g) and a water permeability rate of over 15 000 g/(23 ℃·m2·24 h). Its alkaline degradation rate was also greater than 8.5 g/(23 ℃·10 g·48 h). This type of film not only has excellent performance but also reduces the consumption by 40 % per unit area compared to the 0.01 mm fully biodegradable mulching film.

Key words: poly(carbonate propylene), poly(butylene adipate terephthalate), biodegradable water?permeable mulch film, water vapor permeability, cost reduction and efficiency enhancement

CLC Number: