CN110669321A - 一种化学增粘的再生pet及单丝的制备方法 - Google Patents

一种化学增粘的再生pet及单丝的制备方法 Download PDF

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CN110669321A
CN110669321A CN201911091957.0A CN201911091957A CN110669321A CN 110669321 A CN110669321 A CN 110669321A CN 201911091957 A CN201911091957 A CN 201911091957A CN 110669321 A CN110669321 A CN 110669321A
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tackified
chemically
auxiliary agent
double
screw
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马海燕
司淼
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Nantong New Silk Monofilament Polytron Technologies Inc
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Nantong New Silk Monofilament Polytron Technologies Inc
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion 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
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means 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
    • B29C48/40—Means 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/12—Applications used for fibers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/20—Recycled plastic

Abstract

本发明公开了一种化学增粘的再生PET及单丝的制备方法，化学增粘的再生PET制备时，将聚对苯二甲酸乙二醇酯的回用料送入双螺杆挤出机熔融挤出，熔融挤出过程中加入第一助剂、第二助剂进行反应，反应时间30秒~600秒；双螺杆挤出机的螺杆直径为36~94mm，双螺杆1~9区温度依次为240℃、250℃、260℃、260℃、260℃、260、265℃、265℃、270℃，螺杆挤出机进行抽真空处理。本发明方法简便，可有效提高再生PET的特性粘度，并大大提高了由此制得的单丝的强度。

Description

一种化学增粘的再生PET及单丝的制备方法
技术领域
本发明涉及一种化学增粘的再生PET及单丝的制备方法。
背景技术
现有的聚对苯二甲酸乙二醇酯的回用料，由于特性粘度低，一般在0.55dl/g左右，难以制成高强度的单丝。
发明内容
本发明的目的在于提供一种能有效提高再生聚对苯二甲酸乙二醇酯特性粘度的化学增粘的再生PET及单丝的制备方法。
本发明的技术解决方案是：
一种化学增粘的再生PET，其特征是：采用下列方法制得：
（1）配料：采用下列质量百分比的原料：
聚对苯二甲酸乙二醇酯的回用料 100%；
（2）将上述原料送入双螺杆挤出机熔融挤出，熔融挤出过程中加入第一助剂、第二助剂进行反应，反应时间30秒~600秒；双螺杆挤出机的螺杆直径为36~94mm，双螺杆1~9区温度依次为240℃、250℃、260℃、260℃、260℃、260、265℃、265℃、270℃，螺杆挤出机进行抽真空处理。
所述第一助剂、第二助剂分别由下列质量份的成分复配组成：
聚二甲基硅氧烷71%~99%，异氰酸酯29%~1%。
第一助剂、第二助剂的用量为步骤（1）原料用量的 0.3%~0.5%。
（3）双螺杆挤出后经过滤、水冷却、切粒、脱水、包装得到化学增粘的再生PET切片。
得到的化学增粘的再生PET，其特性粘度为1.01~1.1 dL/g。
一种利用化学增粘的再生PET生产单丝的方法，其特征是：将化学增粘的再生PET经干燥、经螺杆挤出机挤出、冷却、拉伸、热定型、卷绕，制成产品；其中干燥后再生PET切片的水分率约30ppm，挤出机各区温度为285℃、290℃、290℃，液体冷却温度为70℃、总拉伸倍率为5.8~6.8倍，拉伸温度为180℃，热定型温度为220℃。
制得的单丝，强度为5.5~7.0CN/dtex；远大于普通未经上述增粘处理的再生PET单丝的强度（一般为3.5~4 CN/dtex）。
本发明方法简便，可有效提高再生PET的特性粘度，并大大提高了由此制得的单丝的强度。
下面结合实施例对本发明作进一步说明。
具体实施方式
实施例1
将聚对苯二甲酸乙二醇酯的回用料送入双螺杆挤出机熔融挤出，熔融挤出过程中加入第一助剂、第二助剂进行反应，反应时间30秒~600秒（例30秒、200秒、600秒）；双螺杆挤出机的螺杆直径为36~94mm，双螺杆1~9区温度依次为240℃、250℃、260℃、260℃、260℃、260、265℃、265℃、270℃，螺杆挤出机进行抽真空处理。
所述第一助剂、第二助剂分别由下列质量份的成分复配组成：
聚二甲基硅氧烷71%~99%（例71%、90%、99%），异氰酸酯29%~1%（例29%、10%、1%）。
第一助剂、第二助剂的用量为步骤（1）原料用量的 0.3%~0.5%（例0.3%、0.4%、0.5%）。
双螺杆挤出后经过滤、水冷却、切粒、脱水、包装得到化学增粘的再生PET切片，其特性粘度为1.01~1.1 dL/g。
将除湿干燥后水分约30ppm的化学增粘再生PET切片通过单螺杆挤出机，挤出机各区温度为285℃、290℃、290℃，使之熔融，流入计量泵，精确计量后压入组件中。
使用圆形喷丝板，冷却距离为50mm，通过水冷却，水温为70℃，先进行一级湿热拉伸，拉伸温度为90℃，拉伸倍率4.3倍，再进行二级热风拉伸，拉伸温度为180℃，拉伸倍率为1.35倍，定型温度为220℃，得到线径为0.10mm的再生PET单丝。单丝断裂强度5.5cN/dtex。

Claims (2)

1.一种化学增粘的再生PET，其特征是：采用下列方法制得：
（1）配料：采用下列质量百分比的原料：
聚对苯二甲酸乙二醇酯的回用料 100%；
（2）将上述原料送入双螺杆挤出机熔融挤出，熔融挤出过程中加入第一助剂、第二助剂进行反应，反应时间30秒~600秒；双螺杆挤出机的螺杆直径为36~94mm，双螺杆1~9区温度依次为240℃、250℃、260℃、260℃、260℃、260、265℃、265℃、270℃，螺杆挤出机进行抽真空处理；
所述第一助剂、第二助剂分别由下列质量份的成分复配组成：
聚二甲基硅氧烷71%~99%，异氰酸酯29%~1%；
第一助剂、第二助剂的用量为步骤（1）原料用量的 0.3%~0.5%；
（3）双螺杆挤出后经过滤、水冷却、切粒、脱水、包装得到化学增粘的再生PET切片；
得到的化学增粘的再生PET，其特性粘度为1.01~1.1 dL/g。
2.一种利用化学增粘的再生PET生产单丝的方法，其特征是：将化学增粘的再生PET经干燥、经螺杆挤出机挤出、冷却、拉伸、热定型、卷绕，制成产品；其中干燥后再生PET切片的水分率为30ppm，挤出机各区温度为285℃、290℃、290℃，液体冷却温度为70℃、总拉伸倍率为5.8~6.8倍，拉伸温度为180℃，热定型温度为220℃。
CN201911091957.0A 2019-11-11 2019-11-11 一种化学增粘的再生pet及单丝的制备方法 Pending CN110669321A (zh)

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