CN105968614A - 一种耐寒抗冻聚氯乙烯发泡管 - Google Patents

一种耐寒抗冻聚氯乙烯发泡管 Download PDF

Info

Publication number
CN105968614A
CN105968614A CN201610167182.0A CN201610167182A CN105968614A CN 105968614 A CN105968614 A CN 105968614A CN 201610167182 A CN201610167182 A CN 201610167182A CN 105968614 A CN105968614 A CN 105968614A
Authority
CN
China
Prior art keywords
polyvinyl chloride
cold
coupling agent
added
banana
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201610167182.0A
Other languages
English (en)
Inventor
吴铭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maanshan Jinsheng Industrial Design Co Ltd
Original Assignee
Maanshan Jinsheng Industrial Design Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maanshan Jinsheng Industrial Design Co Ltd filed Critical Maanshan Jinsheng Industrial Design Co Ltd
Priority to CN201610167182.0A priority Critical patent/CN105968614A/zh
Publication of CN105968614A publication Critical patent/CN105968614A/zh
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2497/00—Characterised by the use of lignin-containing materials
    • C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

本发明公开了一种耐寒抗冻聚氯乙烯发泡管，由以下原料制备制成：香蕉叶、玉米蛋白纤维、0.3%钛酸酯偶联剂、偶氮二甲酰胺、碳酸氢钠、氧化锌、聚氯乙烯、聚乙烯蜡、邻苯二甲酸二辛酯、氢化蓖麻油、月桂酸钙、油页岩渣、三聚磷酸钠、硫化锑、入硅烷偶联剂kh550、聚乙烯、三聚氰胺、滑石粉、硫磺、埃洛石、去离子水适量；本发明具有优异的缺口冲击强度，而且热稳定性好，耐寒抗冻，耐候耐腐蚀性强，适应范围广。

Description

一种耐寒抗冻聚氯乙烯发泡管
技术领域
本发明涉及发泡聚氯乙烯技术领域，尤其涉及一种耐寒抗冻聚氯乙烯发泡管。
背景技术
排风设备中输送气体的管道称为风管，它把系统中的各种设备或部件连成了一个整体。风管通常用表面光滑的材料制作例如聚氯乙烯管。聚氯乙烯是五大通用塑料之一，在建材、包装等诸多行业有着广泛的用途。聚氯乙烯发泡材料由于具有轻质、隔热、隔音、高比强度、绝缘等特点更备受青睐，然而发泡材料在带来成本降低的同时，机械性能下降，极大的限制了PVC发泡材料的应用。《聚氯乙烯-蒙脱土发泡复合材料的研究》中利用季铵盐、季膦盐和磷酸酯类插层剂与硅烷偶联剂并用，制备改性蒙脱土，结果表明当蒙脱土份数在1-3phr时，压缩性能、拉伸性能、弯曲性能都有提高，热变形温度和阻燃性随着蒙脱土份数的增加而提高。但是蒙脱土加入过量，在基体中团聚而使发泡材料质量下降，并且该发泡材料的拉伸性能、强度、阻燃性、抗化学腐蚀能力均有待提高。
我国是世界香蕉主产国之一，每年可产香蕉五百百万吨供人们享用，但是伴随着产生的香蕉韧皮、香蕉叶、香蕉假茎等副产品却没有得到应用的开发应用，只有少部分被加工成绳索、麻袋、手提包及其他花式品，绝大部分被当做垃圾丢掉了，这不仅浪费了资源，还污染了环境。所以从香蕉叶中提取香蕉纤维制备成复合材料，对我国的经济发展具有重要的意义。香蕉纤维可分为香蕉茎纤维和香蕉叶纤维，香蕉茎纤维具有一般麻类纤维的优点，如强度高、伸长小、纤维粗硬、易于吸湿放湿、易于染色等特点，香蕉叶纤维具有优良的抗碱、酚、甲酸、氯仿、丙酮能力，将其添加到聚氯乙烯材料中能够减少环境污染带来巨大的经济效益，并且还能够提高聚氯乙烯的抗化学腐蚀能力，但是直接加入会降低聚氯乙烯本身的材料性能，限制其应用，必须对香蕉纤维进行改性，提高其与聚氯乙烯的界面相容性。
发明内容
本发明目的就是为了弥补已有技术的缺陷，提供一种耐寒抗冻聚氯乙烯发泡管。
本发明是通过以下技术方案实现的：
一种耐寒抗冻聚氯乙烯发泡管，由以下重量份的原料制备制成：香蕉叶26-30、玉米蛋白纤维2.3-2.7、0.3%钛酸酯偶联剂1-1.5、偶氮二甲酰胺1.5-2、碳酸氢钠5-6、氧化锌0.2-0.3、聚氯乙烯90-100、聚乙烯蜡2-3、邻苯二甲酸二辛酯1-2、氢化蓖麻油2-3、月桂酸钙1-2、油页岩渣1.5-2、三聚磷酸钠0.8-1、硫化锑1.3-1.5、入硅烷偶联剂kh550 0.1-0.2、聚乙烯9-12、三聚氰胺2-3、滑石粉7-8、硫磺2-3、埃洛石2.3-3、去离子水适量。
所述一种耐寒抗冻聚氯乙烯发泡管，由以下具体步骤制备制成：
（1）将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维，再将香蕉纤维和玉米蛋白纤维进行混纺并条得到混合纤维条备用；将0.3%钛酸酯偶联剂用75%的乙醇溶解，按照质量比3:4充分混合均匀，再将混合纤维条以浴比1：10浸渍到钛酸酯偶联剂溶液中，加热至溶剂挥发，烘干后备用；
（2）将邻苯二甲酸二辛酯和乙二醇混合，搅拌均匀后加入埃洛石、油页岩渣、硫化锑超声分散均匀，将步骤（1）制备的改性混合纤维浸渍在EVA乳液中24-28h，压制干燥制成细丝，然后将细丝和上述抗冻液混合；
（3）将步骤（2）制备的混合物中加入硅烷偶联剂kh550和三聚磷酸钠研磨分散，烘干后和聚乙烯加到造粒机中制成颗粒；
（4）将聚氯乙烯及其剩余物质加到高速混合机中混合均匀，随后加到热炼机中混合塑化，温度控制在130-140℃，再加入步骤（3）制备的产物，混合均匀后加到模腔中进行模压发泡，温度控制在185-190℃，时间为2.5-3min，保压压力为15-18MPa，自然冷却即可得到。
本发明的优点是：本发明利用钛酸酯偶联剂改性混纺的香蕉叶纤维和玉米蛋白纤维条，使香蕉叶纤维中半纤维素和木质素成分减少，纤维素原纤的结合程度减弱，容易发生解旋和形变，提高纤维间发生反应，并且提高了断裂伸长率和拉伸强度，再利用无机抗冻液乙二醇和增塑剂处理纳米混合物，使其易与塑料相容，并且提高其混合纤维的阻燃、耐磨、耐火等性能，并且利用聚乙烯制备成颗粒，提高了与聚氯乙烯的相容性，使纤维条在聚氯乙烯中分散性好，不团聚，达到提高聚氯乙烯发泡管阻燃、耐磨、耐腐蚀、质轻、高强等特性；本发明具有优异的缺口冲击强度，而且热稳定性好，耐寒抗冻，耐候耐腐蚀性强，适应范围广。
具体实施方式
一种耐寒抗冻聚氯乙烯发泡管，由以下重量份（公斤）的原料制备制成：香蕉叶26、玉米蛋白纤维2.3、0.3%钛酸酯偶联剂1、偶氮二甲酰胺1.5、碳酸氢钠5、氧化锌0.2、聚氯乙烯90、聚乙烯蜡2、邻苯二甲酸二辛酯1、氢化蓖麻油2、月桂酸钙1、油页岩渣1.5、三聚磷酸钠0.8、硫化锑1.3、入硅烷偶联剂kh550 0.1、聚乙烯9、三聚氰胺2、滑石粉7、硫磺2、埃洛石2.3、去离子水适量。
所述一种耐寒抗冻聚氯乙烯发泡管，由以下具体步骤制备制成：
（1）将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维，再将香蕉纤维和玉米蛋白纤维进行混纺并条得到混合纤维条备用；将0.3%钛酸酯偶联剂用75%的乙醇溶解，按照质量比3:4充分混合均匀，再将混合纤维条以浴比1：10浸渍到钛酸酯偶联剂溶液中，加热至溶剂挥发，烘干后备用；
（2）将邻苯二甲酸二辛酯和乙二醇混合，搅拌均匀后加入埃洛石、油页岩渣、硫化锑超声分散均匀，将步骤（1）制备的改性混合纤维浸渍在EVA乳液中24h，压制干燥制成细丝，然后将细丝和上述抗冻液混合；
（3）将步骤（2）制备的混合物中加入硅烷偶联剂kh550和三聚磷酸钠研磨分散，烘干后和聚乙烯加到造粒机中制成颗粒；
（4）将聚氯乙烯及其剩余物质加到高速混合机中混合均匀，随后加到热炼机中混合塑化，温度控制在130℃，再加入步骤（3）制备的产物，混合均匀后加到模腔中进行模压发泡，温度控制在185℃，时间为2.5min，保压压力为15MPa，自然冷却即可得到。
该聚氯乙烯材料拉伸强度：60.8MPa，断裂伸长率：6.1%，弯曲强度102MPa，弯曲模量：2.92GPa，冲击强度：10.5kJ/m2，氧指数：35.8%。

Claims (2)

1.一种耐寒抗冻聚氯乙烯发泡管，其特征在于，由以下重量份的原料制备制成：香蕉叶26-30、玉米蛋白纤维2.3-2.7、0.3%钛酸酯偶联剂1-1.5、偶氮二甲酰胺1.5-2、碳酸氢钠5-6、氧化锌0.2-0.3、聚氯乙烯90-100、聚乙烯蜡2-3、邻苯二甲酸二辛酯1-2、氢化蓖麻油2-3、月桂酸钙1-2、油页岩渣1.5-2、三聚磷酸钠0.8-1、硫化锑1.3-1.5、硅烷偶联剂kh550 0.1-0.2、聚乙烯9-12、三聚氰胺2-3、滑石粉7-8、硫磺2-3、埃洛石2.3-3、去离子水适量。
2.根据权利要求1所述一种耐寒抗冻聚氯乙烯发泡管，其特征在于，由以下具体步骤制备制成：
（1）将香蕉叶清洗干净晾干后采用压榨、漂白、清洗、烘干的方法提取香蕉纤维，再将香蕉纤维和玉米蛋白纤维进行混纺并条得到混合纤维条备用；将0.3%钛酸酯偶联剂用75%的乙醇溶解，按照质量比3:4充分混合均匀，再将混合纤维条以浴比1：10浸渍到钛酸酯偶联剂溶液中，加热至溶剂挥发，烘干后备用；
（2）将邻苯二甲酸二辛酯和乙二醇混合，搅拌均匀后加入埃洛石、油页岩渣、硫化锑超声分散均匀，将步骤（1）制备的改性混合纤维浸渍在EVA乳液中24-28h，压制干燥制成细丝，然后将细丝和上述抗冻液混合；
（3）将步骤（2）制备的混合物中加入硅烷偶联剂kh550和三聚磷酸钠研磨分散，烘干后和聚乙烯加到造粒机中制成颗粒；
（4）将聚氯乙烯及其剩余物质加到高速混合机中混合均匀，随后加到热炼机中混合塑化，温度控制在130-140℃，再加入步骤（3）制备的产物，混合均匀后加到模腔中进行模压发泡，温度控制在185-190℃，时间为2.5-3min，保压压力为15-18MPa，自然冷却即可得到。
CN201610167182.0A 2016-03-23 2016-03-23 一种耐寒抗冻聚氯乙烯发泡管 Withdrawn CN105968614A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610167182.0A CN105968614A (zh) 2016-03-23 2016-03-23 一种耐寒抗冻聚氯乙烯发泡管

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610167182.0A CN105968614A (zh) 2016-03-23 2016-03-23 一种耐寒抗冻聚氯乙烯发泡管

Publications (1)

Publication Number Publication Date
CN105968614A true CN105968614A (zh) 2016-09-28

Family

ID=56988704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610167182.0A Withdrawn CN105968614A (zh) 2016-03-23 2016-03-23 一种耐寒抗冻聚氯乙烯发泡管

Country Status (1)

Country Link
CN (1) CN105968614A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108795382A (zh) * 2018-05-18 2018-11-13 黄石市长鑫新材料有限公司 一种纳米粒子表面修饰硫化锑及其制备方法和应用
CN117801482A (zh) * 2023-12-29 2024-04-02 广东弘超橡塑实业有限公司 一种可降解tpe复合材料及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102850692A (zh) * 2012-08-09 2013-01-02 贵州国塑科技管业有限责任公司 木塑复合管材、管件生产工艺及方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102850692A (zh) * 2012-08-09 2013-01-02 贵州国塑科技管业有限责任公司 木塑复合管材、管件生产工艺及方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
何建新 主编: "《新型纤维材料学》", 31 July 2014, 东华大学出版社 *
本书编委会 编: "《最新保温隔热材料及其制品实用配方创新设计、相关质量检验技术标准实用手册(第2卷)》", 31 August 2004, 广州音像出版社 *
罗河胜 编: "《塑料材料手册(第三版)》", 31 March 2010, 广东科技出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108795382A (zh) * 2018-05-18 2018-11-13 黄石市长鑫新材料有限公司 一种纳米粒子表面修饰硫化锑及其制备方法和应用
CN117801482A (zh) * 2023-12-29 2024-04-02 广东弘超橡塑实业有限公司 一种可降解tpe复合材料及其制备方法

Similar Documents

Publication Publication Date Title
CN104761880A (zh) 短纤维增强拉挤复合材料太阳能组件边框及其制备方法
CN109054323B (zh) 木质素/微晶纤维素复合物、增强聚乳酸3d打印材料及其制备方法
CN102304238B (zh) 一种再生纤维素复合膜及其制备方法
CN108822440A (zh) 一种阻燃木塑板及其制备方法
CN110128800A (zh) 稻壳粉/pbat生物质基全降解材料及制备方法
CN106147263A (zh) 一种阻燃木塑复合材料
CN104927183A (zh) 利用废旧pp回收料生产建筑用木塑模板的方法
CN108641388A (zh) 一种阻燃木塑复合材料及其制备方法
CN105968614A (zh) 一种耐寒抗冻聚氯乙烯发泡管
CN103709773B (zh) 碱脲解缠结秸秆/树脂复合板的制备方法
CN105968622A (zh) 一种质轻高强聚氯乙烯发泡管
CN109096643A (zh) 一种新型绿色阻燃防水木塑复合材料及其制备方法
CN106566241A (zh) 一种绝缘阻燃型玻纤增强pa66/pps/pes电力金具材料及其制备方法
CN106543713A (zh) 一种聚四氟乙烯改性的耐磨型玻纤增强pa66电力金具材料及其制备方法
CN105968624A (zh) 一种抗压聚氯乙烯发泡管
CN105968607A (zh) 一种使用寿命长的聚氯乙烯发泡管
CN105968610A (zh) 一种耐磨防腐聚氯乙烯发泡管
CN105968608A (zh) 一种贝壳粉增强的聚氯乙烯发泡管
CN105968621A (zh) 一种排风风管用聚氯乙烯发泡管
CN105968615A (zh) 一种高韧聚氯乙烯发泡管
CN113943479A (zh) 一种改性的热塑性增强纤维材料及其制备方法
CN105968619A (zh) 一种防水聚氯乙烯发泡管
CN105968626A (zh) 一种用于排风设备的高性能聚氯乙烯管
CN108999007B (zh) 一种组分缺失型植物长纤维及其制备方法与应用
CN105968611A (zh) 一种弹性系数好不易裂的聚氯乙烯发泡管

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20160928

WW01 Invention patent application withdrawn after publication