CN102241853B - 一种钙晶须改性聚乙烯复合材料及其制备方法 - Google Patents

一种钙晶须改性聚乙烯复合材料及其制备方法 Download PDF

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CN102241853B
CN102241853B CN201110096033A CN201110096033A CN102241853B CN 102241853 B CN102241853 B CN 102241853B CN 201110096033 A CN201110096033 A CN 201110096033A CN 201110096033 A CN201110096033 A CN 201110096033A CN 102241853 B CN102241853 B CN 102241853B
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刘珍如
刘立文
付桃梅
杨志强
宁勇
鲁纪鸣
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C48/0017Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04Particle-shaped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885Screw or gear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895Barrel or housing

Abstract

一种钙晶须改性聚乙烯复合材料及其制备方法,该硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯100份,硫酸钙晶须20~40份,低密度聚乙烯10~20份,抗氧剂1680.1~0.5份,炭黑0.5~2份,硬脂酸1~2份。其制备方法是,将硫酸钙晶须和硬脂酸加入到高速混合机中混合5~12min;再将所述其余原料与改性硫酸钙晶须在高速混合机中混合5~10min;然后将所得混合物于双螺杆中挤出造粒。本发明之改性聚乙烯复合材料透明度高,光泽度好,流动性低,利于吹膜及滚塑,特别适于制作薄膜类产品。

Description

一种钙晶须改性聚乙烯复合材料及其制备方法
技术领域
本发明涉及一种聚乙烯复合材料及其制备方法,尤其涉及一种硫酸钙晶须改性线性低密度聚乙烯复合材料及其制备方法。
背景技术
线性低密度聚乙烯具有优异的抗拉伸、抗穿透、抗冲击和抗撕裂性能,广泛应用于塑料薄膜。但是,LLDPE薄膜存在透明度低,光泽度差,以及流动性太高的缺点,限制了LLDPE薄膜的加工及运用。
发明内容
    本发明要解决的技术问题是,克服现有聚乙烯材料的不足,提供一种透明度高,光泽度好,流动性低的硫酸钙晶须改性线性低密度聚乙烯(LLDPE)复合材料及其制备方法。
本发明解决所述技术问题所采用的技术方案是:
本发明之硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯(LLDPE )100份,硫酸钙晶须 20~40份,低密度聚乙烯(LDPE) 10~20份,抗氧剂168 0.1~0.5份,炭黑 0.5~2份,硬脂酸1~2份。
优选的重量配比为:线性低密度聚乙烯(LLDPE )100份,硫酸钙晶须 20份,低密度聚乙烯(LDPE) 10份,抗氧剂168 0.2份,炭黑2份,硬脂酸2份。
本发明之硫酸钙晶须改性聚乙烯复合材料的制备方法,包括如下步骤:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合5~12min(优选10min),得到改性硫酸钙晶须;改性硫酸钙晶须长径比10~30,平均直径0.5~4                                                
Figure 494053DEST_PATH_IMAGE001
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于65~75℃(优选70℃)下混合5~10min(优选7min),得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为120℃~180℃(优选150℃),螺杆转速为90~150转/分钟(优选100转/分钟)。
硫酸钙晶须,又称石膏晶须,是一种硫酸钙的纤维状单晶体。研究表明,本发明使用之改性硫酸钙晶须具有均匀的横截面,完整的内部结构,这一特征赋予其接近晶体理论值-原子间价键的强度。由于其具有极高的强度,细微的尺寸,易与LLDPE界面粘合,提高与基体的相容性和界面黏结力,当受外力强迫取向时,LLDPE中的残余应力能很好地传递给硫酸钙晶须,从而提高LLDPE复合材料的强度;同时,硫酸钙晶须能均匀分散在LLDPE中,不易团聚,能降低LLDPE的结晶度,增加LLDPE的透明度,降低LLDPE的流动性。
本发明之改性聚乙烯复合材料透明度高,光泽度好,流动性低,利于吹膜及滚塑,特别适于制作薄膜类产品。
具体实施方式
以下结合实施例对本发明作进一步详细说明。
实施例1:
本实施例硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯(LLDPE)100份,硫酸钙晶须 20份,低密度聚乙烯(LDPE)20份,抗氧剂168 0.2份,炭黑2份,硬脂酸1份。
制备方法:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合10min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比16,平均直径2.8
Figure 293381DEST_PATH_IMAGE001
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于70℃下混合7min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为150℃,螺杆转速为100转/分钟。
本实施例产品力学性能测试按ATSM规定方法进行,结果见表1。
实施例2:
本实施例硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯(LLDPE )100份,硫酸钙晶须40份,低密度聚乙烯(LDPE)20份,抗氧剂168 0.2份,炭黑2份,硬脂酸2份。
制备方法:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合10min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比15,平均直径2.6
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于70℃下混合7min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为150℃,螺杆转速为100转/分钟。
本实施例产品力学性能测试按ATSM规定方法进行,结果见表1。
实施例3:
本实施例硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯(LLDPE )100份,硫酸钙晶须 20份,低密度聚乙烯(LDPE) 10份,抗氧剂168 0.2份,炭黑2份,硬脂酸2份。
制备方法:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合10min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比15,平均直径3
Figure 59660DEST_PATH_IMAGE001
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于70℃下混合7min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为150℃,螺杆转速为100转/分钟。
本实施例产品力学性能测试按ATSM规定方法进行,结果见表1。
实施例4:
本实施例硫酸钙晶须改性聚乙烯复合材料由以下重量份数的原料制成:线性低密度聚乙烯(LLDPE )100份,硫酸钙晶须 30份,低密度聚乙烯(LDPE) 10份,抗氧剂168 0.2份,炭黑2份,硬脂酸1份。
制备方法:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合10min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比18,平均直径2.5
Figure 301286DEST_PATH_IMAGE001
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于70℃下混合7min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为150℃,螺杆转速为100转/分钟。
本实施例产品力学性能测试按ATSM规定方法进行,结果见表1。
表1 实施例1-4产品力学性能比较

Claims (4)

1. 一种硫酸钙晶须改性聚乙烯复合材料,其特征在于,由以下重量份数的原料制成:线性低密度聚乙烯100份,硫酸钙晶须 20~40份,低密度聚乙烯10~20份,抗氧剂168 0.1~0.5份,炭黑 0.5~2份,硬脂酸1~2份。
2.根据权利要求1所述的硫酸钙晶须改性聚乙烯复合材料,其特征在于,由以下重量份数的原料制成:线性低密度聚乙烯100份,硫酸钙晶须 20份,低密度聚乙烯10份,抗氧剂168 0.2份,炭黑2份,硬脂酸2份。
3.一种如权利要求1或2所述的硫酸钙晶须改性聚乙烯复合材料的制备方法,其特征在于,包括以下步骤:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合5~12min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比10~30,平均直径0.5~4μm;
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于65~75℃下混合5~10min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为120~180℃,螺杆转速为90~150转/分钟。
4.一种如权利要求3所述的硫酸钙晶须改性聚乙烯复合材料的制备方法,其特征在于,包括以下步骤:
(1)将硫酸钙晶须和硬脂酸,加入到高速混合机中混合10min,得到改性硫酸钙晶须;改性硫酸钙晶须长径比15,平均直径3μm;
(2)将所述线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑加入高速混合机中,于70℃下混合7min,得线性低密度聚乙烯、低密度聚乙烯、抗氧剂168 、炭黑与改性硫酸钙晶须的混合物;
(3)将步骤(2)所得混合物于双螺杆中挤出造粒,料筒温度为150℃,螺杆转速为100转/分钟。
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