Research and development of polyethylene special materials for compound films

doi:10.19491/j.issn.1001-9278.2022.06.012

Abstract

Abstract:

The article focused on the structure and performance analysis of polyethylene special materials， confirmed the specification of the PE?HD special resin with a commercial grade of 6903B. Through adjusting the addition amounts of comonomers and the processing conditions of polymerization， a PE?HD special resin was successfully produced for the use of compound films. Application experiments confirmed the PE?HD 6903B could meet the requirement of production for compound films with different thicknesses.

Key words: compound film, high density polyethylene, bimodal, molecular weight distribution

CLC Number:

TQ325.1⁺2

ZHU Jingyun, YI Huijun, YAN Wei, LI Dawei. Research and development of polyethylene special materials for compound films[J]. China Plastics, 2022, 36(6): 77-80.

序号	项目	标准	指标
1	熔体流动速率（190 ℃，5.0 kg）/g•（10 min）^-1	GB/T 3682—2000	0.38±0.05
2	密度/g•cm^-³	GB/T 1033.2—2010	0.953±0.004
3	拉伸屈服强度/MPa	GB/T 1040.2—2006	≥21
4	断裂标称应变/%	GB/T 1040.2—2006	≥500
5	简支梁缺口冲击强度（23 ℃）/ kJ•m^-2	GB/T 1043.1—2008	≥13

序号	项目	标准	指标
1	熔体流动速率（190 ℃，5.0 kg）/g•（10 min）^-1	GB/T 3682—2000	0.38±0.05
2	密度/g•cm^-³	GB/T 1033.2—2010	0.953±0.004
3	拉伸屈服强度/MPa	GB/T 1040.2—2006	≥21
4	断裂标称应变/%	GB/T 1040.2—2006	≥500
5	简支梁缺口冲击强度（23 ℃）/ kJ•m^-2	GB/T 1043.1—2008	≥13

样品	1^＃	2^＃（201804）
重均分子量/×10^-4	23.94	24.24
数均分子量/×10^-4	1.26	1.24
分布（D）	19.07	19.62

样品	1^＃	2^＃（201804）
重均分子量/×10^-4	23.94	24.24
数均分子量/×10^-4	1.26	1.24
分布（D）	19.07	19.62

样品号	1^＃	2^＃（202109）
重均分子量/×10^-4	25.4	26.1
数均分子量/×10^-4	1.16	1.09
分布（D）	21.9	23.9

Research and development of polyethylene special materials for compound films

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Figures/Tables 11

References 3

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样品	1^#	2^#
熔融温度（T_m）/℃	131.0	132.0
熔融峰宽/℃	17.35	16.54
结晶度/%	78.1	79.6
结晶温度/℃	116.0	117.4

测试项目		1^＃	2^＃
熔体流动速率/g•（10 min）^-1	5.0 kg	0.31	0.38
熔体流动速率/g•（10 min）^-1	21.6 kg	10.8	12.4
熔流比		34.8	32.6
断裂标称应变/%		480	540
拉伸断裂应力/MPa		14.9	21.4
拉伸屈服应力/MPa		24.1	25.8
弯曲模量/MPa		1 120	1 250
弯曲应力/MPa		20.9	23.0
简支梁缺口冲击强度/J•g^-1	23 ℃	12P	16P
简支梁缺口冲击强度/J•g^-1	-20 ℃	6.6C	9.9C
密度/g•cm^-3		0.951 9	0.952 4

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