Biodegradable composite oxygen-barrier film and use thereof

A technology of oxygen barrier and barrier layer, which is applied in the field of biodegradable composite oxygen barrier film and its application, can solve the problems such as inappropriate preparation of fully biodegradable oxygen barrier film, and achieve the goals of preventing white pollution, prolonging shelf life and improving physical and mechanical properties Effect

Active Publication Date: 2011-04-06
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents US0069993, WO109222, US0163944 and US0184220 respectively disclose the preparation method of biodegradable gas barrier container, the preparation method of biodegradable water vapor barrier film and the preparation method of laminated sheet with oxygen barrier performance. Biodegradable Oxygen Barrier Film

Method used

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  • Biodegradable composite oxygen-barrier film and use thereof
  • Biodegradable composite oxygen-barrier film and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, preparation biodegradable composite oxygen barrier film

[0023] 1) Preparation of biodegradable composite oxygen barrier film I

[0024]Polybutylene adipate-terephthalate (number-average molecular weight is 40000g / mol, molecular weight distribution is 2.5) 20kg, polycarbonate 1,2-propylene glycol (number-average molecular weight is 80000g / mol, molecular weight distribution 2.5) 20kg, polybutylene adipate-terephthalate 20kg (the number average molecular weight is 40000g / mol, and the molecular weight distribution is 2.5) as outer, middle and inner layer input in common three-layer single-screw film blowing unit, The temperature of the three sections of the inner and outer screw is 140°C, 160°C and 170°C, the temperature of the middle layer is 100°C, 140°C and 140°C, and the head temperature is 165°C. Simultaneously start three extruding units to prepare biodegradable composite oxygen barrier film I. Biodegradable composite oxygen barrier film I is a compos...

Embodiment 2

[0030] Embodiment 2, preparation biodegradable composite oxygen barrier film

[0031] 1) Preparation of Biodegradable Composite Oxygen Barrier Film III

[0032] Respectively polylactic acid (PLA) (number average molecular weight is 80000g / mol, and molecular weight distribution is 2.0) 30kg, nanometer montmorillonite modified polycarbonate 1,2-propanedicarbonate I 30kg and polybutylene succinate (number average The molecular weight is 60000, and the molecular weight distribution is 2.0) 15kg are respectively used as the outer, middle and inner layers, and put into the ordinary three-layer single-screw blown film unit. The temperature is: 100°C, 140°C and 140°C, and the head temperature is 165°C. Simultaneously start three extruding units to prepare the biodegradable composite oxygen barrier film III, the biodegradable composite oxygen barrier film III is a composite film composed of three layers of films, from bottom to top followed by polylactic acid (PLA) (number average mol...

Embodiment 3

[0037] Embodiment 3, preparation biodegradable composite oxygen barrier film

[0038] 1) Preparation of biodegradable composite oxygen barrier film V

[0039] Respectively polybutylene succinate (number average molecular weight is 60000, molecular weight distribution is 2.0) 20kg, polycaprolactone (number average molecular weight is 85000, molecular weight distribution is 1.8) 10kg, polycarbonate 1,2-propylene glycol (number average molecular weight is 80000g / mol, molecular weight distribution is 2.5) 40kg, polycaprolactone (number average molecular weight is 85000, molecular weight distribution is 1.8) 10kg and polybutylene succinate (number average molecular weight is 60000, molecular weight distribution 2.0) 20kg is put into the five-layer single-screw co-extrusion film blowing unit from the outside to the inside, in which the temperature of the three-stage screw of the material polybutylene succinate is: 140 ° C, 160 ° C and 170 ° C, the material polybutylene succinate Th...

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Abstract

The invention discloses a biodegradable composite oxygen-barrier film and its preparation method and use. The biodegradable composite oxygen-barrier film is composed of at least two support layers and barrier layer which is located in each of the two support layers. Said support layer is selected from at least one of the following materials: polylactic acid, polybutylene succinate, polycaprolactone, poly(butylene adipate-co-terephthalate), poly(beta-hydroxybutyrate) and poly(beta-hydroxybutyrate-co-hydroxyvalerate); said barrier layers located in each of the two support layers are same or different, and the barrier layer is selected from poly(1,2-propylene carbonate) and nano-montmorillonite modified poly(1,2-propylene carbonate). The biodegradable composite oxygen-barrier film can be used as food or medicine package, and it will help to prolong shelf-life of food and medicine and the like; it can also prevent white-pollution.

Description

technical field [0001] The invention relates to a biodegradable composite oxygen barrier film, a preparation method and application thereof. Background technique [0002] Oxygen barrier packaging materials are very important to prolong the shelf life and shelf life of food and medicine. Since disposable packaging materials have become one of the "white pollution", the active development of fully biodegradable oxygen barrier films for packaging has become an important issue in recent years. research hotspot. [0003] PVDC, EVOH, PAN, PEN, PA66, PA6, and PET commonly used as barrier materials do not have biodegradability. Although EVOH is used in a large amount, its water resistance is poor. With the increase of air humidity, the oxygen barrier performance Significantly decreased. [0004] The fully biodegradable materials developed so far include polybutylene succinate (PBS), polylactic acid (PLA), polycaprolactone (PCL), polyglycolic acid (PGA), polyadipate-p-phenylene Bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B65D65/46
CPCB32B2250/40B32B2250/244B32B2307/7244B32B27/08B32B2250/03B32B27/36B32B2439/00B32B2307/7163B32B2439/80B65D65/466B32B2264/104B32B27/365B32B27/20B32B2439/70B32B2250/05Y02W90/10Y10T428/24975Y10T428/31507
Inventor 周庆海王献红高凤翔赵晓江王佛松傅送保陈科宇王亮亮陈步宁徐建波王国忠
Owner CHINA NAT OFFSHORE OIL CORP
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