Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Mulching film and preparation method thereof

A mulching film and metallocene technology, which is applied in the field of mulching film without ultraviolet absorbent and its preparation, can solve the problems of inconsistent initial mechanical properties, difficult promotion and application, large cost increase, etc., achieve good aging resistance effect, reduce white Pollution, achieve the effect of effective recycling

Inactive Publication Date: 2019-05-14
PETROCHINA CO LTD
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent with the publication number CN 102660074 A discloses a special weather-resistant functional mulch film for two years, which is made of the following raw materials in weight percentage: LLDPE 60-80%, LDPE5-15%, HDPE3-8%, mPE5- 15%, anti-aging masterbatch 2-6%; wherein, anti-aging masterbatch is made of the following raw materials by weight percentage: LLDPE powder 35-45%, LDPE25-35%, HDPE6-15%, mPE5-12%, 2-7% hindered amine light stabilizer, 0.5-3.5% antioxidant, 0.5-3.5% ultraviolet absorber, 1.5-5.0% dispersant white oil; the above-mentioned weather-resistant film still has high physical and mechanical properties after 360 days of use. Performance retention rate, but the initial mechanical properties do not meet the local standard requirements of Xinjiang (DB65 / 3189-2014), so it cannot be used in Xinjiang's harsh high temperature and high drought environment; in addition, the above-mentioned film uses a large amount of hindered amine light stabilizer and ultraviolet absorbers to achieve anti-aging effects, the cost has increased greatly, and it is difficult to be effectively promoted and applied among farmers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mulching film and preparation method thereof
  • Mulching film and preparation method thereof
  • Mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Mulch composition

[0033] The mulch film of the present embodiment is made up of the following components by weight:

[0034]

[0035] Among them, the melt flow rate MFR of metallocene linear polyethylene is 1.0g / 10min, and the density is 0.918g / cm 3 , the weight average molecular weight is 89,000, and the molecular weight distribution is 2.0.

[0036] Second, the preparation method of the film

[0037] Mix linear low-density polyethylene, metallocene linear polyethylene, high-density polyethylene, hindered amine light stabilizer, phenolic antioxidant and ester antioxidant according to the above weight parts to prepare a mixture; subsequently, Put the uniformly mixed material into the plasticizing extruder hopper through the automatic feeder for automatic plasticizing extrusion and inflation traction; wherein, the temperature of plasticization extrusion is 190°C, and the inflation ratio of inflation traction is 3, The traction ratio is 4, and the mulch film wi...

Embodiment 2

[0040] 1. Mulch composition

[0041] The mulch film of the present embodiment is made up of the following components by weight:

[0042]

[0043] Among them, the melt flow rate MFR of metallocene linear polyethylene is 0.5g / 10min, and the density is 0.916g / cm 3 , the weight average molecular weight is 100,000, and the molecular weight distribution is 2.2.

[0044] Second, the preparation method of the film

[0045] Mix linear low-density polyethylene, metallocene linear polyethylene, high-density polyethylene, hindered amine light stabilizer, phenolic antioxidant and ester antioxidant according to the above weight parts to prepare a mixture; subsequently, Put the uniformly mixed material into the hopper of the plasticizing extruder through the automatic feeder for automatic plasticizing extrusion and inflation traction; wherein, the temperature of plasticization extrusion is 210°C, and the inflation ratio of inflation traction is 2.8, The traction ratio is 5, and the mul...

Embodiment 3

[0048] 1. Mulch composition

[0049] The mulch film of the present embodiment is made up of the following components by weight:

[0050]

[0051] Among them, the melt flow rate MFR of metallocene linear polyethylene is 0.9g / 10min, and the density is 0.918g / cm 3 , the weight average molecular weight is 91,000, and the molecular weight distribution is 2.5.

[0052] Second, the preparation method of the film

[0053] Mix linear low-density polyethylene, metallocene linear polyethylene, high-density polyethylene, hindered amine light stabilizer, phenolic antioxidant and ester antioxidant according to the above weight parts to prepare a mixture; subsequently, Put the uniformly mixed mixture into the hopper of the plasticizing extruder through the automatic feeder for automatic plasticizing extrusion and inflation traction; the temperature of plasticization extrusion is 220°C, and the inflation ratio of inflation traction is 2.5, The traction ratio is 5, and the mulch film (re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
densityaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

The invention provides a mulching film and a preparation method thereof. The mulching film comprises, by weight, 76.5-81.8 parts of linear low-density polyethylene, 15-20 parts of metallocene linear polyethylene, 3-5 parts of high-density polyethylene, 0.02-0.15 part of hindered amine light stabilizer, 0.05-0.15 part of phenolic antioxidant and 0.05-0.2 part of ester-type antioxidant; in particular, the melt flow rate (MFR) of the metallocene linear polyethylene is smaller than or equal to 1.0g / 10min, and the density thereof is 0.916-0.922g / cm<3>. The mulching film does not contain ultravioletabsorbing agents and dispersing agents, so that the anti-aging effect is achieved while the production cost is reduced; in particular, the mulching film meets the relevant requirements of the DB65 / 3189-2014 standard, and can be applied to harsh high-temperature and high-dryness environments such as Xinjiang, thereby having a wide application range.

Description

technical field [0001] The invention relates to a mulch film and a preparation method thereof, in particular to a mulch film without an ultraviolet absorber and a preparation method thereof. Background technique [0002] Mulch film is the ground covering film, which has the functions of increasing temperature and moisture, resisting drought and saving water, improving soil physical and chemical properties, improving soil fertility, suppressing weeds, preventing pests from invading, and promoting plant growth. In our country, plastic film has been widely used in various crops such as grain, cotton, oil, vegetables, melons and fruits, tobacco, sugar, medicine, hemp, tea, forest, etc., and is welcomed by farmers. In my country's three northern regions, factors such as low temperature, little rain, drought, barrenness, and short frost-free period limit the development of agriculture. At this time, plastic film is very important to ensure the growth of crops in arid areas, and it...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K5/3492C08K5/134C08K5/526C08J5/18
Inventor 关莉张璐朱军胡斌杨帆彭涛宋津冯凯缪江张鹏宇窦立江滕云鹏
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com