CN114736497A - 一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 - Google Patents
一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 Download PDFInfo
- Publication number
- CN114736497A CN114736497A CN202210420277.4A CN202210420277A CN114736497A CN 114736497 A CN114736497 A CN 114736497A CN 202210420277 A CN202210420277 A CN 202210420277A CN 114736497 A CN114736497 A CN 114736497A
- Authority
- CN
- China
- Prior art keywords
- polylactic acid
- toughness
- master batch
- transparent high
- acid film
- 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.)
- Pending
Links
- 229920006381 polylactic acid film Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 42
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 39
- 239000004626 polylactic acid Substances 0.000 claims abstract description 39
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 24
- 239000004632 polycaprolactone Substances 0.000 claims abstract description 24
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 17
- 239000012745 toughening agent Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 45
- 238000001125 extrusion Methods 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 14
- 239000003960 organic solvent Substances 0.000 claims description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000005543 nano-size silicon particle Substances 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 claims description 5
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 238000003851 corona treatment Methods 0.000 claims description 4
- 238000009998 heat setting Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000002390 rotary evaporation Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 125000003944 tolyl group Chemical group 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229920002988 biodegradable polymer Polymers 0.000 description 1
- 239000004621 biodegradable polymer Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
-
- 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
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
本发明涉及聚乳酸薄膜技术领域,尤其为一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法,包括聚乳酸母粒、聚己内酯、增韧剂以及热稳定剂,且各成分按照重量比分别为:聚乳酸母粒105~120份、聚己内酯45~55份、增韧剂17~23份以及热稳定剂2~5份,本发明可以有效解决现有技术中生产出的聚乳酸薄膜的韧性较差,导致其使用范围较小的问题。
Description
技术领域
本发明涉及聚乳酸薄膜技术领域,具体为一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法。
背景技术
聚乳酸是由乳酸或丙交酯经开环聚合而成的可生物降解的聚合物,其原料来源丰富且可再生,在自然界中可生物降解成二氧化碳和水,对环境友好,因而被广泛应用于包装材料、农膜、生物医用材料等领域。
现有技术中生产出的聚乳酸薄膜的韧性较差,导致其使用范围较小。
综上所述,本发明提供一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法来改善这一问题。
发明内容
本发明的目的在于提供一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:
一种透明高韧性双向拉伸聚乳酸薄膜,包括聚乳酸母粒、聚己内酯、增韧剂以及热稳定剂,且各成分按照重量比分别为:聚乳酸母粒105~120份、聚己内酯45~55份、增韧剂17~23份以及热稳定剂2~5份。
一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,包括以下步骤:
S1,先对聚乳酸母粒和聚己内酯进行干燥处理,将增塑剂、热稳定剂以及干燥后的聚乳酸母粒和聚己内酯一起送入双螺杆挤出机中熔融挤出,经风刀冷却和流延辊拉伸后,得到混合母料;
S2,将得到的混合母料送入平板硫化机中,于11MPa~12.5MPa的压力下压成片材,然后送入到冷压机中,在12.5MPa~13MPa的压力下保压冷却至室温,再送入水槽中调湿,得到混合母料片;
S3,对混合母料片进行横纵向同步拉伸,并在158℃~163℃下进行热定型处理后,再进行电晕处理,然后收卷分切,制得高韧性双向拉伸聚乳酸薄膜。
作为本发明优选的方案,所述聚乳酸母粒的含水量为0.0015%~0.0018%,聚乳酸母粒的粒径为5.1mm~5.8mm,增韧剂为改性纳米二氧化硅,热稳定剂为三(2.4-二叔丁基苯基)亚磷酸。
作为本发明优选的方案,所述改性纳米二氧化硅的制备方法为将纳米二氧化硅颗粒均匀分散在有机溶剂中,然后加入硅烷偶联剂,在85℃~88℃下搅拌1.5h~2h,再旋转蒸发去除有机溶剂,然后洗涤、干燥,即得改性纳米二氧化硅。
作为本发明优选的方案,所述纳米二氧化硅颗粒的粒径为3.1μm~3.3μm,纳米二氧化硅颗粒与有机溶剂的质量比为3:55,所述有机溶剂为甲苯,硅烷偶联剂与球形二氧化硅颗粒的质量比为3:50,硅烷偶联剂由苯基三乙氧基硅烷和γ-(2,3-环氧丙氧)丙基三甲氧基硅烷按照质量比为6:1的比例混合制成。
作为本发明优选的方案,所述S1中干燥处理的具体操作步骤为:将聚乳酸母粒和聚己内酯在105℃~120℃条件下经过硫化床干燥1.5h~1.75h,再在真空烘箱中以110℃~115℃真空干燥4~6h。
作为本发明优选的方案,所述S1中双螺杆挤出机的挤出口膜温度为212℃~215℃,风刀设置于挤出口膜与流延辊之间,风刀的风口方向与熔体表面形成的夹角为91.5°~92.8°,所述风刀的鼓风量为252m3/min~258m3/min,风刀的鼓风温度为102℃~107℃,挤出口膜和流延辊的间距为80mm~98mm,流延辊的辊温为102℃~105℃。
作为本发明优选的方案,所述S2中平板硫化机的温度为160℃~168℃,水槽的温度为78℃~85℃,调湿后的混合母料片表面用气刀将表面残留水分吹干。
作为本发明优选的方案,所述S1中双螺杆挤出机为同向双螺杆挤出机,挤出温度为191℃~195℃,螺杆转速320rpm~350rpm,螺杆长径比L/D为55:1。
作为本发明优选的方案,所述S3中拉伸温度为128℃~135℃,拉伸倍率为2.1*2.1~4.1*4.1。
与现有技术相比,本发明的有益效果是:
1、本发明中,通过使用入改性纳米二氧化硅作为增韧剂,改性纳米二氧化硅在制造时使用的硅烷偶联剂能够提高SiO2与聚乳酸之间的相容性,增强聚乳酸与SiO2之间的相互作用,从而提高拉伸强度,硅烷偶联剂中的苯基三乙氧基硅烷含刚性苯环结构,有利于提高聚乳酸材料的刚性,提高拉伸强度,而γ-(2,3-环氧丙氧)丙基三甲氧基硅烷为含环氧基的柔性长链,既能与苯环刚性链段发生相互缠结,从而对聚乳酸基体中形成的SiO2三维网络结构起到强化作用,更好地发挥增强效果,又能通过环氧基在熔融混合时与聚乳酸上的羧基和羟基反应,进一步促进SiO2三维网络结构与聚乳酸基体的相互作用,从而进一步提高了聚乳酸薄膜的挺度和拉伸强度,同时纳米二氧化硅能够使聚乳酸薄膜内形成立构复合晶体的分子间有序结构,从而得到完善的立构复合晶体,提高了聚乳酸薄膜的韧性和强度,在制备聚乳酸薄膜时,熔融状态的聚己内酯与聚乳酸的界面结合较好,因此在拉伸过程中两相界面不易脱粘,使聚己内酯随聚乳酸有效的拉伸取向而呈现纤维状,这种纤维状结构的聚己内酯与聚乳酸的接触面积更大,可以更好地阻止裂纹的蔓延,具有很好的增韧作用,而将风刀设置于挤出口膜与流延辊之间且风刀的风口方向与熔体表面形成夹角,使制造出的混合母料中存在取向的纤维晶,取向的纤维晶具有很高的断裂伸长率和拉伸强度,进一步的提高了制造出的聚乳酸薄膜的韧性,在改性纳米二氧化硅、聚己内酯以及采用熔体挤出流延工艺,使制造出的聚乳酸薄膜韧性得到极大地提高。
具体实施方式
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例,基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同,本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明,本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
本发明提供一种技术方案:
一种透明高韧性双向拉伸聚乳酸薄膜,包括聚乳酸母粒、聚己内酯、增韧剂以及热稳定剂,且各成分按照重量比分别为:聚乳酸母粒105~120份、聚己内酯45~55份、增韧剂17~23份以及热稳定剂2~5份。
一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,包括以下步骤:
S1,先对聚乳酸母粒和聚己内酯进行干燥处理,将增塑剂、热稳定剂以及干燥后的聚乳酸母粒和聚己内酯一起送入双螺杆挤出机中熔融挤出,经风刀冷却和流延辊拉伸后,得到混合母料;
S2,将得到的混合母料送入平板硫化机中,于11MPa~12.5MPa的压力下压成片材,然后送入到冷压机中,在12.5MPa~13MPa的压力下保压冷却至室温,再送入水槽中调湿,得到混合母料片;
S3,对混合母料片进行横纵向同步拉伸,并在158℃~163℃下进行热定型处理后,再进行电晕处理,然后收卷分切,制得高韧性双向拉伸聚乳酸薄膜。
进一步的,所述聚乳酸母粒的含水量为0.0015%~0.0018%,聚乳酸母粒的粒径为5.1mm~5.8mm,增韧剂为改性纳米二氧化硅,热稳定剂为三(2.4-二叔丁基苯基)亚磷酸。
进一步的,所述改性纳米二氧化硅的制备方法为将纳米二氧化硅颗粒均匀分散在有机溶剂中,然后加入硅烷偶联剂,在85℃~88℃下搅拌1.5h~2h,再旋转蒸发去除有机溶剂,然后洗涤、干燥,即得改性纳米二氧化硅。
进一步的,所述纳米二氧化硅颗粒的粒径为3.1μm~3.3μm,纳米二氧化硅颗粒与有机溶剂的质量比为3:55,所述有机溶剂为甲苯,硅烷偶联剂与球形二氧化硅颗粒的质量比为3:50,硅烷偶联剂由苯基三乙氧基硅烷和γ-(2,3-环氧丙氧)丙基三甲氧基硅烷按照质量比为6:1的比例混合制成。
进一步的,所述S1中干燥处理的具体操作步骤为:将聚乳酸母粒和聚己内酯在105℃~120℃条件下经过硫化床干燥1.5h~1.75h,再在真空烘箱中以110℃~115℃真空干燥4~6h。
进一步的,所述S1中双螺杆挤出机的挤出口膜温度为212℃~215℃,风刀设置于挤出口膜与流延辊之间,风刀的风口方向与熔体表面形成的夹角为91.5°~92.8°,所述风刀的鼓风量为252m3/min~258m3/min,风刀的鼓风温度为102℃~107℃,挤出口膜和流延辊的间距为80mm~98mm,流延辊的辊温为102℃~105℃。
进一步的,所述S2中平板硫化机的温度为160℃~168℃,水槽的温度为78℃~85℃,调湿后的混合母料片表面用气刀将表面残留水分吹干,拉伸温度为128℃~135℃,拉伸倍率为2.1*2.1~4.1*4.1。
进一步的,所述S1中双螺杆挤出机为同向双螺杆挤出机,挤出温度为191℃~195℃,螺杆转速320rpm~350rpm,螺杆长径比L/D为55:1。
进一步的,所述S3中拉伸温度为128℃~135℃,拉伸倍率为2.1*2.1~4.1*4.1
具体实施案例:
将纳米二氧化硅颗粒均匀分散在有甲苯中,纳米二氧化硅颗粒的粒径为3.3μm,纳米二氧化硅颗粒与有机溶剂的质量比为3:55,然后加入硅烷偶联剂,硅烷偶联剂由苯基三乙氧基硅烷和γ-(2,3-环氧丙氧)丙基三甲氧基硅烷按照质量比为6:1的比例混合制成,硅烷偶联剂与球形二氧化硅颗粒的质量比为3:50,并在88℃下搅拌2h,再旋转蒸发去除有机溶剂,然后洗涤、干燥,即得改性纳米二氧化硅;
称取聚乳酸母粒120份、聚己内酯55份、增韧剂23份以及热稳定剂5份,聚乳酸母粒的含水量为0.0018%,聚乳酸母粒的粒径为5.8mm,增韧剂为改性纳米二氧化硅,热稳定剂为三(2.4-二叔丁基苯基)亚磷酸;
将聚乳酸母粒和聚己内酯在120℃条件下经过硫化床干燥1.75h,再在真空烘箱中以115℃真空干燥6h,将增塑剂、热稳定剂以及干燥后的聚乳酸母粒和聚己内酯一起送入双螺杆挤出机中熔融挤出,双螺杆挤出机为同向双螺杆挤出机,挤出温度为195℃,螺杆转速350rpm,螺杆长径比L/D为55:1,经风刀冷却和流延辊拉伸后,得到混合母料,双螺杆挤出机的挤出口膜温度为215℃,风刀设置于挤出口膜与流延辊之间,风刀的风口方向与熔体表面形成的夹角为92.8°,所述风刀的鼓风量为258m3/min,风刀的鼓风温度为107℃,挤出口膜和流延辊的间距为98mm,流延辊的辊温为105℃;
将得到的混合母料送入平板硫化机中,平板硫化机的温度为168℃,于12.5MPa的压力下压成片材,然后送入到冷压机中,在13MPa的压力下保压冷却至室温,再送入水槽中调湿,水槽的温度为85℃,调湿后的混合母料片表面用气刀将表面残留水分吹干,得到混合母料片;
对混合母料片进行横纵向同步拉伸,拉伸温度为135℃,拉伸倍率为4.1*4.1,并在163℃下进行热定型处理后,再进行电晕处理,然后收卷分切,制得高韧性双向拉伸聚乳酸薄膜。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (10)
1.一种透明高韧性双向拉伸聚乳酸薄膜,包括聚乳酸母粒、聚己内酯、增韧剂以及热稳定剂,且各成分按照重量比分别为:聚乳酸母粒105~120份、聚己内酯45~55份、增韧剂17~23份以及热稳定剂2~5份。
2.一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于,包括以下步骤:
S1,先对聚乳酸母粒和聚己内酯进行干燥处理,将增塑剂、热稳定剂以及干燥后的聚乳酸母粒和聚己内酯一起送入双螺杆挤出机中熔融挤出,经风刀冷却和流延辊拉伸后,得到混合母料;
S2,将得到的混合母料送入平板硫化机中,于11MPa~12.5MPa的压力下压成片材,然后送入到冷压机中,在12.5MPa~13MPa的压力下保压冷却至室温,再送入水槽中调湿,得到混合母料片;
S3,对混合母料片进行横纵向同步拉伸,并在158℃~163℃下进行热定型处理后,再进行电晕处理,然后收卷分切,制得高韧性双向拉伸聚乳酸薄膜。
3.根据权利要求1所述的一种透明高韧性双向拉伸聚乳酸薄膜,其特征在于:所述聚乳酸母粒的含水量为0.0015%~0.0018%,聚乳酸母粒的粒径为5.1mm~5.8mm,增韧剂为改性纳米二氧化硅,热稳定剂为三(2.4-二叔丁基苯基)亚磷酸。
4.根据权利要求3所述的一种透明高韧性双向拉伸聚乳酸薄膜,其特征在于:所述改性纳米二氧化硅的制备方法为将纳米二氧化硅颗粒均匀分散在有机溶剂中,然后加入硅烷偶联剂,在85℃~88℃下搅拌1.5h~2h,再旋转蒸发去除有机溶剂,然后洗涤、干燥,即得改性纳米二氧化硅。
5.根据权利要求4所述的一种透明高韧性双向拉伸聚乳酸薄膜,其特征在于:所述纳米二氧化硅颗粒的粒径为3.1μm~3.3μm,纳米二氧化硅颗粒与有机溶剂的质量比为3:55,所述有机溶剂为甲苯,硅烷偶联剂与球形二氧化硅颗粒的质量比为3:50,硅烷偶联剂由苯基三乙氧基硅烷和γ-(2,3-环氧丙氧)丙基三甲氧基硅烷按照质量比为6:1的比例混合制成。
6.根据权利要求2所述的一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于:所述S1中干燥处理的具体操作步骤为:将聚乳酸母粒和聚己内酯在105℃~120℃条件下经过硫化床干燥1.5h~1.75h,再在真空烘箱中以110℃~115℃真空干燥4~6h。
7.根据权利要求2所述的一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于:所述S1中双螺杆挤出机的挤出口膜温度为212℃~215℃,风刀设置于挤出口膜与流延辊之间,风刀的风口方向与熔体表面形成的夹角为91.5°~92.8°,所述风刀的鼓风量为252m3/min~258m3/min,风刀的鼓风温度为102℃~107℃,挤出口膜和流延辊的间距为80mm~98mm,流延辊的辊温为102℃~105℃。
8.根据权利要求2所述的一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于:所述S2中平板硫化机的温度为160℃~168℃,水槽的温度为78℃~85℃,调湿后的混合母料片表面用气刀将表面残留水分吹干。
9.根据权利要求2所述的一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于:所述S1中双螺杆挤出机为同向双螺杆挤出机,挤出温度为191℃~195℃,螺杆转速320rpm~350rpm,螺杆长径比L/D为55:1。
10.根据权利要求2所述的一种透明高韧性双向拉伸聚乳酸薄膜的制备方法,其特征在于:所述S3中拉伸温度为128℃~135℃,拉伸倍率为2.1*2.1~4.1*4.1。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210420277.4A CN114736497A (zh) | 2022-04-20 | 2022-04-20 | 一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210420277.4A CN114736497A (zh) | 2022-04-20 | 2022-04-20 | 一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114736497A true CN114736497A (zh) | 2022-07-12 |
Family
ID=82284072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210420277.4A Pending CN114736497A (zh) | 2022-04-20 | 2022-04-20 | 一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114736497A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115572471A (zh) * | 2022-11-08 | 2023-01-06 | 广东工业大学 | 一种拉伸性能优良的复合聚己内酯材料及其制备方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014094520A (ja) * | 2012-11-12 | 2014-05-22 | Unitika Ltd | ポリ乳酸系二軸延伸フィルム |
CN104312121A (zh) * | 2014-11-19 | 2015-01-28 | 威海共达塑胶化工制品有限公司 | 高韧性透明聚乳酸薄膜及其制备方法 |
CN110387112A (zh) * | 2019-07-23 | 2019-10-29 | 湖南工业大学 | 一种可降解食品包装膜材料及制备工艺 |
CN110696462A (zh) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | 一种高强度双向拉伸聚乳酸薄膜及其制备方法 |
CN112644123A (zh) * | 2020-12-15 | 2021-04-13 | 厦门长塑实业有限公司 | 一种增韧型双向拉伸聚乳酸薄膜及其制备方法 |
CN113088057A (zh) * | 2021-05-20 | 2021-07-09 | 中国科学院长春应用化学研究所 | 一种增强增韧的聚乳酸共混材料及其制备方法 |
-
2022
- 2022-04-20 CN CN202210420277.4A patent/CN114736497A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014094520A (ja) * | 2012-11-12 | 2014-05-22 | Unitika Ltd | ポリ乳酸系二軸延伸フィルム |
CN104312121A (zh) * | 2014-11-19 | 2015-01-28 | 威海共达塑胶化工制品有限公司 | 高韧性透明聚乳酸薄膜及其制备方法 |
CN110387112A (zh) * | 2019-07-23 | 2019-10-29 | 湖南工业大学 | 一种可降解食品包装膜材料及制备工艺 |
CN110696462A (zh) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | 一种高强度双向拉伸聚乳酸薄膜及其制备方法 |
CN112644123A (zh) * | 2020-12-15 | 2021-04-13 | 厦门长塑实业有限公司 | 一种增韧型双向拉伸聚乳酸薄膜及其制备方法 |
CN113088057A (zh) * | 2021-05-20 | 2021-07-09 | 中国科学院长春应用化学研究所 | 一种增强增韧的聚乳酸共混材料及其制备方法 |
Non-Patent Citations (1)
Title |
---|
张广成等: "《塑料成型加工技术》", 西北工业大学出版社 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115572471A (zh) * | 2022-11-08 | 2023-01-06 | 广东工业大学 | 一种拉伸性能优良的复合聚己内酯材料及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2022252266A1 (zh) | 一种复合增韧耐高温聚乳酸改性材料及其制备方法 | |
CN108659491B (zh) | 一种增强增韧的聚乳酸复合材料及其制备方法 | |
CN109251494B (zh) | 一种天然杜仲胶/纤维素改性聚乳酸复合材料及制备方法 | |
CN109777057B (zh) | 一种聚乳酸/竹炭复合材料的制备方法 | |
CN112048162A (zh) | 一种吸塑薄壁制品用全生物降解改性塑料及其制备方法 | |
CN113337088B (zh) | 注塑用复合降解塑料材料的制备方法 | |
CN109320933B (zh) | 一种增强增韧竹纤维/聚乳酸复合材料及其制备方法 | |
CN115593061B (zh) | 一种高阻隔性生物降解复合膜及其制备工艺 | |
CN113736088A (zh) | 一种聚倍半硅氧烷,一种pla合金及一种吸管料 | |
CN114736497A (zh) | 一种透明高韧性双向拉伸聚乳酸薄膜及其制备方法 | |
CN115838507A (zh) | 一种高强度可降解聚乙烯流延膜及其制备方法 | |
CN115322543A (zh) | 一种聚乳酸/聚己内酯/植物炭黑复合材料及其制备方法 | |
CN113442401A (zh) | 一种高强高阻隔pga/pbat食品包装膜及其制备方法 | |
CN113150520B (zh) | 一种用于一次性勺子的生物降解塑料 | |
CN115368720A (zh) | 一种可降解聚合物纳米复合材料及其制备方法 | |
CN112895659B (zh) | 一种多层叠加复合材料和制备方法及其应用 | |
CN115141471A (zh) | 一种生物降解材料及其制备方法 | |
CN115011071A (zh) | Smc复合材料及其制备方法 | |
CN112375354A (zh) | 一种碳纤维聚乳酸填充母料及其制备方法 | |
CN115257112B (zh) | 一种多层生物可降解气泡膜及其制备工艺 | |
CN115626999B (zh) | 石墨烯全降解复合材料及其制备方法 | |
CN114015214B (zh) | 一种聚乳酸/可降解聚酯弹性体共混物及其制备方法 | |
CN115403905B (zh) | 石墨烯全降解复合膜袋及其制备方法 | |
CN117986829B (zh) | 一种环保可降解高强度复合塑料包装袋 | |
CN113480790B (zh) | 一种纳米碳化硅协同改性麦秸秆复合材料的制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220712 |