Preparation and Performance of New EVOH/PE⁃RT Alloy⁃coated PE⁃RT Double⁃layer Oxygen Barrier Tube

doi:10.19491/j.issn.1001-9278.2021.07.005

Abstract

Abstract:

Aiming at the problem that the common oxygen barrier pipes on the current market cannot be easily hot melted and recycled， a new type of ethylene?vinyl alcohol copolymer （EVOH）/heat?resistant polyethylene （PE?RT） alloy coated with a PE?RT double?layer oxygen barrier was prepared. The inner working tube was made using PE?RT as a raw material， and the outer layer was fabricated with an EVOH/PE?RT alloy barrier material. The effect of EVOH and compatibilizer contents on the oxygen barrier performance of EVOH/PE?RT alloy barrier film was studied. The oxygen permeability and hot melt recovery of the new double?layer oxygen barrier tube and the mechanical properties of the recovered material obtained from this oxygen barrier tube were evaluated. The results indicated that the oxygen permeability of the EVOH/PE?RT alloy barrier film decreases with an increase in EVOH content and tends to increase with an increase in the compatibilizer content. The new double?layer oxygen barrier tube containing 30 wt% EVOH， 64 wt% PE?RT and 6 wt% compatibilizer exhibited oxygen permeability similar to the commercially available 3?layer and 5?layer oxygen barrier tube， and hot?melt recovery could be realized in this tube. Meanwhile， the recovered material presented good mechanical properties.

Key words: ethylene?vinyl alcohol copolymer, heat?resistant polyethylene, alloy, double?layer oxygen barrier tube, oxygen transmission rate, hot melt recovery, mechanical property

CLC Number:

TQ320.72⁺4

NI Jia, DUAN Kaige, ZHU Hui, HU Mingyuan, CHENG Zhi, YU Dongming. Preparation and Performance of New EVOH/PE⁃RT Alloy⁃coated PE⁃RT Double⁃layer Oxygen Barrier Tube[J]. China Plastics, 2021, 35(7): 32-35.

Figures/Tables 6

Fig.1. Structure of new double?layer oxygen barrier tube

Fig.2. Effect of EVOH content on oxygen transmission rate of alloy barrier film

Fig.3. Effect of compatibilizer content on oxygen transmission rate of alloy barrier film

样品编号	样品名称	压差法测试氧气透过量/ cm³·m^-2·d^-1·Pa^-1
1^#	新型双层阻氧管	8.99
2^#	无阻氧PE?RT管	17.51
3^#	3层阻氧PE?RT管	6.87
4^#	5层阻氧PE?RT管	6.52

Tab. 1. Oxygen permeability of 4 kinds of oxygen barrier tubes

Fig.4. Cast film made from new 2?layer oxygen barrier tube waste cast film

样品名称	拉伸强度/MPa	断裂伸长率/%
新型双层阻氧管回收料	17.43	692.28
纯PE?RT料	18.60	700.00

Tab.2. Tensile performance of the material

References 7

1	张成武.耐热聚乙烯（PE⁃RT）管材［J］.塑料，2003，32（3）： 78⁃83.
	ZHANG C W.Heat⁃resistant Polyethylene （PE⁃RT） Pipe［J］.Plastics，2003，32（3）：78⁃83.
2	吴大鸣，刘颖，龙文保.几种用于建筑冷热水输送的塑料管材的比较［J］.塑料，2001，30（2）： 49⁃53.
	WU D M， LIU Y， LONG W B.Comparison of Several Plastic Pipes Used in the Construction of Cold and Hot Water Transportation［J］.Plastics，2001，30（2）：49⁃53.
3	王敏.乙烯⁃乙烯醇共聚物（EVOH）的性能、加工及应用［J］.塑料科技，1988（1）：28⁃34.
	WANG M.Performance， Processing and Application of Ethylene⁃vinyl Alcohol Copolymer （EVOH）［J］.Plastics Technology，1988（1）：28⁃34.
4	江萍.阻氧材料与管材的阻氧性能［J］.现代商贸工业，2007，19（1）：120⁃121.
	JIANG P.Oxygen Barrier Material and Tube Oxygen Barrier Performance［J］.Modern Trade and Industry，2007，19（1）：120⁃121.
5	武志军.冷热水用塑料管材透氧率的测试方法［J］.塑料，2009，38（4）：113⁃115.
	WU Z J.Test Method of Oxygen Permeability of Plastic Pipes for Hot and Cold Water［J］.Plastics，2009，38（4）：113 ⁃115.
6	轻工业塑料加工应用研究所.塑料薄膜和薄片气体透过性试验方法压差法：［S］.北京：中国标准出版社，2000.
7	倪佳，段凯歌，朱辉等. 压差法测试塑料管材氧气透过量的研究［J］.中国塑料，2021，35（1）：73⁃77.
	NI J，DUAN K G，ZHU H. Study on Oxygen Permeability of Plastic Pipes through Manometric Method［J］. China Plastics，2021，35（1）：73⁃77.

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