CN115214214A - Stretch-resistant biaxially oriented polyamide film and preparation method thereof - Google Patents
Stretch-resistant biaxially oriented polyamide film and preparation method thereof Download PDFInfo
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- 229920006233 biaxially oriented polyamide Polymers 0.000 title claims description 42
- 238000002360 preparation method Methods 0.000 title description 8
- 239000004952 Polyamide Substances 0.000 claims abstract description 42
- 229920002647 polyamide Polymers 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000009998 heat setting Methods 0.000 claims abstract description 13
- 238000003851 corona treatment Methods 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- 239000000155 melt Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 description 7
- 125000003368 amide group Chemical group 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 4
- 229920002292 Nylon 6 Polymers 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
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- 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
- C08K5/00—Use of organic ingredients
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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Abstract
本发明公开了一种抗拉伸的双向拉伸聚酰胺薄膜，包括第一抗拉伸层、聚酰胺层和第二抗拉伸层，所述聚酰胺层设置在所述第一抗拉伸层和所述第二抗拉伸层之间。本发明还公开了一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法，包括如下步骤：S1：对原料进行干燥；S2：熔融塑化挤出；S3：在冷辊上形成厚片；S4：将厚片进行预热；S5：拉伸形成薄膜；S6：热定型、冷却和电晕处理；S7：按要求进行分切。本发明的聚酰胺薄膜由三层结构构成，上下两层的抗拉伸层中添加有抗拉伸添加剂，可大大增强其抗拉伸性能，且整体各处抗拉伸强度均相同，使用时能显著增强聚酰胺薄膜的抗拉伸性，提高其适用范围。
The invention discloses a stretch-resistant biaxially stretched polyamide film, comprising a first stretch-resistant layer, a polyamide layer and a second stretch-resistant layer, wherein the polyamide layer is arranged on the first stretch-resistant layer. layer and the second stretch resistant layer. The invention also discloses a method for preparing a stretch-resistant biaxially stretched polyamide film, which includes the following steps: S1: drying the raw material; S2: melting, plasticizing and extruding; S3: forming a thick sheet on a cold roll; S4: preheating the thick sheet; S5: stretching to form a film; S6: heat setting, cooling and corona treatment; S7: slitting as required. The polyamide film of the present invention is composed of a three-layer structure, and anti-stretch additives are added to the upper and lower anti-stretch layers, which can greatly enhance its anti-stretch performance, and the overall tensile strength is the same everywhere. It can significantly enhance the stretch resistance of the polyamide film and improve its application range.
Description
技术领域technical field
本发明涉及聚酰胺薄膜技术领域，具体为一种抗拉伸的双向拉伸聚酰胺薄膜及其制备方法。The invention relates to the technical field of polyamide films, in particular to a stretch-resistant biaxially stretched polyamide film and a preparation method thereof.
背景技术Background technique
聚酰胺是指高分子链上具有酰胺基(－NH－CO－)重复结构单元的聚合物，其中以脂肪族为主链的聚酰胺称为尼龙。根据国际上通行的标准，聚酰胺通常可以缩写成PA。Polyamide refers to a polymer with an amide group (-NH-CO-) repeating structural unit on the polymer chain, and a polyamide with an aliphatic main chain is called nylon. According to internationally accepted standards, polyamides can usually be abbreviated as PA.
尼龙6的结构简式为The structural formula of nylon 6 is
是由己内酰胺开环聚合得到。己内酰胺的水解聚合反应包括开环、加成、缩合和链交换四个基本反应，其反应式如下：It is obtained by ring-opening polymerization of caprolactam. The hydrolysis polymerization reaction of caprolactam includes four basic reactions of ring-opening, addition, condensation and chain exchange, and its reaction formula is as follows:
(1)水解(1) Hydrolysis
(2)缩合聚合(2) Condensation polymerization
(3)加成聚合(3) Addition polymerization
(4)链交换(4) Chain exchange
尼龙6属于线形高分子，分子链骨架由－C－N－链组成，具有良好的柔曲性，是典型的热塑性聚合物。分子链上有规律地交替排列着较强的极性酰胺基，分子链很规整，具有较强的结晶能力。极性的酰胺基可以使分子链之间形成氢键，因为一个分子链上的酰胺基中与氮原子连接的氢原子是质子提供体,另一个分子链上的酰胺基中与碳原子连接的氧原子是质子接受体，二者之间相互吸引形成氢键。氢键的形成增大了分子链之间的作用力，使聚合物的结晶能力进一步增强，同时也使聚合物的熔点升高，另一方面，分子链的柔曲性又赋予尼龙6良好的韧性。Nylon 6 is a linear polymer, and its molecular chain skeleton is composed of -C-N- chains. It has good flexibility and is a typical thermoplastic polymer. Strong polar amide groups are regularly and alternately arranged on the molecular chain, the molecular chain is very regular, and it has strong crystallization ability. Polar amide groups can form hydrogen bonds between molecular chains, because the hydrogen atom connected to the nitrogen atom in the amide group on one molecular chain is a proton donor, and the amide group on the other molecular chain is connected to a carbon atom. Oxygen atoms are proton acceptors, and the two attract each other to form hydrogen bonds. The formation of hydrogen bonds increases the force between the molecular chains, further enhances the crystallization ability of the polymer, and also increases the melting point of the polymer. On the other hand, the flexibility of the molecular chain gives nylon 6 a good quality. toughness.
现有的双向拉伸聚酰胺薄膜存在着抗拉伸强度不高的缺点，已经不能很好地满足现有的包装要求，为此，我们提出了一种抗拉伸的双向拉伸聚酰胺薄膜及其制备方法，以解决上述存在的问题The existing biaxially oriented polyamide film has the disadvantage of low tensile strength, and can no longer meet the existing packaging requirements. For this reason, we propose a stretch-resistant biaxially oriented polyamide film. And preparation method thereof, to solve the above-mentioned problems
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种抗拉伸的双向拉伸聚酰胺薄膜及其制备方法，该抗拉伸的双向拉伸聚酰胺薄膜由三层结构构成，上下两层的抗拉伸层中添加有抗拉伸添加剂，可大大增强其抗拉伸性能，且整体各处抗拉伸强度均相同，使用时能显著增强聚酰胺薄膜的抗拉伸性，提高其适用范围，以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a stretch-resistant biaxially stretched polyamide film and a preparation method thereof. The stretch-resistant biaxially stretched polyamide film is composed of a three-layer structure. There are anti-stretch additives, which can greatly enhance its anti-stretch performance, and the overall tensile strength is the same everywhere, which can significantly enhance the stretch resistance of the polyamide film when used, and improve its scope of application to solve the above-mentioned background technology. issues raised in.
为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种抗拉伸的双向拉伸聚酰胺薄膜，包括第一抗拉伸层、聚酰胺层和第二抗拉伸层，所述聚酰胺层设置在所述第一抗拉伸层和所述第二抗拉伸层之间。A stretch-resistant biaxially oriented polyamide film, comprising a first stretch-resistant layer, a polyamide layer and a second stretch-resistant layer, wherein the polyamide layer is disposed on the first stretch-resistant layer and the between the second stretch-resistant layers.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜优选的，所述第一抗拉伸层和所述第二抗拉伸层均由聚酰胺层和抗拉伸添加剂构成。As a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, the first stretch-resistant layer and the second stretch-resistant layer are both composed of a polyamide layer and a stretch-resistant additive.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜优选的，所述抗拉伸的双向拉伸聚酰胺薄膜的整体厚度为10-20μm，且所述第一抗拉伸层和所述第二抗拉伸层的厚度相同。Preferably as a stretch-resistant biaxially oriented polyamide film of the present invention, the overall thickness of the stretch-resistant biaxially oriented polyamide film is 10-20 μm, and the first stretch-resistant layer and the The thickness of the second anti-stretch layer is the same.
一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法，包括如下步骤：A preparation method of a stretch-resistant biaxially oriented polyamide film, comprising the steps of:
S1：对所有的原料进行干燥，控制原料的水分含量；S1: Dry all the raw materials to control the moisture content of the raw materials;
S2：将第一抗拉伸层、聚酰胺层和第二抗拉伸层的原料分别按配方比例混合，并通过高速搅拌机分散均匀，然后通过各自的挤出机熔融塑化挤出，经过衣架式模头流出熔体；S2: Mix the raw materials of the first anti-stretching layer, the polyamide layer and the second anti-stretching layer respectively according to the formula ratio, and disperse them uniformly through a high-speed mixer, then melt and plasticize and extrude them through their respective extruders, and pass through the hanger. The die head flows out the melt;
S3：采用低压气刀将熔体贴附在冷辊上形成一定厚度的厚片；S3: Use a low-pressure air knife to attach the melt to the cold roll to form a thick sheet of a certain thickness;
S4：将厚片通过辊筒进行预热；S4: Preheat the thick sheet through the roller;
S5：将预热的厚片经过纵向拉伸和横向拉伸形成薄膜；S5: The preheated thick sheet is stretched longitudinally and transversely to form a film;
S6：将拉伸后的薄膜进行热定型处理，热定型处理完成后再进行冷却和电晕处理并收卷，即得到抗拉伸的双向拉伸聚酰胺薄膜；S6: The stretched film is subjected to heat setting treatment, and after the heat setting treatment is completed, cooling and corona treatment are performed and wound up to obtain a stretch-resistant biaxially oriented polyamide film;
S7：对收卷后的抗拉伸的双向拉伸聚酰胺薄膜按要求进行分切。S7: slitting the stretch-resistant biaxially oriented polyamide film after winding as required.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S1中对所有的原料采用加热的方法进行干燥，且原料的水分含量控制在800ppm以下。As a method for preparing a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, in S1, all raw materials are dried by heating, and the moisture content of the raw materials is controlled below 800 ppm.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S2中挤出机的温度为240-260℃。As a method for preparing a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, the temperature of the extruder in S2 is 240-260°C.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S3中厚片的厚度为100-140μm，冷辊的温度为10-30℃。As a method for preparing a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, the thickness of the S3 medium-thick sheet is 100-140 μm, and the temperature of the cold roll is 10-30° C.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S4中辊筒的温度为50-60℃。As a method for preparing a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, the temperature of the roller in S4 is 50-60°C.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S5中拉伸温度为60-99℃；拉伸比为1.60*1.64-1.64*1.68。As a method for preparing a stretch-resistant biaxially stretched polyamide film of the present invention, preferably, the stretching temperature in S5 is 60-99° C.; the stretching ratio is 1.60*1.64-1.64*1.68.
作为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法优选的，所述S6中热定型处理的定型温度为200-240℃，定型时间为8-12s；电晕处理功率为6-10W。As a method for preparing a stretch-resistant biaxially oriented polyamide film of the present invention, preferably, the setting temperature of the heat setting treatment in the S6 is 200-240° C., and the setting time is 8-12 s; the corona treatment power is 6-10W.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明的聚酰胺薄膜由三层结构构成，上下两层的抗拉伸层中添加有抗拉伸添加剂，可大大增强其抗拉伸性能，且整体各处抗拉伸强度均相同，使用时能显著增强聚酰胺薄膜的抗拉伸性，提高其适用范围。The polyamide film of the present invention is composed of a three-layer structure, and anti-stretch additives are added to the upper and lower anti-stretch layers, which can greatly enhance its anti-stretch performance, and the overall tensile strength is the same everywhere. It can significantly enhance the stretch resistance of the polyamide film and improve its application range.
附图说明Description of drawings
图1为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的结构示意图；Fig. 1 is the structural representation of a kind of anti-stretching biaxially oriented polyamide film of the present invention;
图2为本发明的一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法的流程示意图。FIG. 2 is a schematic flow chart of a method for preparing a stretch-resistant biaxially oriented polyamide film according to the present invention.
图中：1、第一抗拉伸层；2、聚酰胺层；3、第二抗拉伸层。In the figure: 1. the first anti-stretching layer; 2. the polyamide layer; 3. the second anti-stretching layer.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，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。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
因此，以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
实施例1Example 1
一种抗拉伸的双向拉伸聚酰胺薄膜，所述抗拉伸的双向拉伸聚酰胺薄膜的整体厚度为10μm，其包括第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3，所述聚酰胺层2设置在所述第一抗拉伸层1和所述第二抗拉伸层3之间，所述第一抗拉伸层1和所述第二抗拉伸层3的厚度相同，所述第一抗拉伸层1和所述第二抗拉伸层3均由聚酰胺层2和抗拉伸添加剂构成。An anti-stretch biaxially oriented polyamide film, the overall thickness of the anti-stretch biaxially oriented polyamide film is 10 μm, which comprises a first
一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法，包括如下步骤：A preparation method of a stretch-resistant biaxially oriented polyamide film, comprising the steps of:
S1：对所有的原料采用加热的方法进行干燥，且原料的水分含量控制在800ppm以下，对于聚酰胺来说，干燥过程除了降低含水率外，也可进行充分结晶；S1: All raw materials are dried by heating, and the moisture content of the raw materials is controlled below 800 ppm. For polyamide, in addition to reducing the moisture content, the drying process can also be fully crystallized;
S2：将第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3的原料分别按配方比例混合，并通过高速搅拌机分散均匀，然后通过各自的挤出机在240℃的温度下熔融塑化挤出，经过衣架式模头流出熔体；S2: Mix the raw materials of the first
S3：采用低压气刀将熔体贴附在温度为10℃的冷辊上形成厚度为100μm的厚片；S3: use a low-pressure air knife to attach the melt to a cold roll with a temperature of 10°C to form a thick sheet with a thickness of 100 μm;
S4：将厚片通过温度为50℃的辊筒进行预热；S4: Preheat the thick sheet through a roller with a temperature of 50°C;
S5：将预热的厚片经过纵向拉伸和横向拉伸形成薄膜，其中拉伸温度为60℃；拉伸比为1.60*1.64；S5: The preheated thick sheet is stretched longitudinally and transversely to form a film, wherein the stretching temperature is 60°C; the stretching ratio is 1.60*1.64;
S6：将拉伸后的薄膜进行热定型处理，定型温度为200℃，定型时间为s，热定型处理完成后再进行冷却和电晕处理，电晕处理功率为6W，并收卷，即得到抗拉伸的双向拉伸聚酰胺薄膜；S6: The stretched film is subjected to heat setting treatment, the setting temperature is 200 ° C, the setting time is s, and after the heat setting treatment is completed, cooling and corona treatment are performed, the corona treatment power is 6W, and the winding is obtained. Stretch-resistant biaxially oriented polyamide film;
S7：对收卷后的抗拉伸的双向拉伸聚酰胺薄膜按要求进行分切。S7: slitting the stretch-resistant biaxially oriented polyamide film after winding as required.
实施例2Example 2
一种抗拉伸的双向拉伸聚酰胺薄膜，所述抗拉伸的双向拉伸聚酰胺薄膜的整体厚度为15μm，其包括第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3，所述聚酰胺层2设置在所述第一抗拉伸层1和所述第二抗拉伸层3之间，所述第一抗拉伸层1和所述第二抗拉伸层3的厚度相同，所述第一抗拉伸层1和所述第二抗拉伸层3均由聚酰胺层2和抗拉伸添加剂构成。An anti-stretch biaxially oriented polyamide film, the overall thickness of the anti-stretch biaxially oriented polyamide film is 15 μm, which comprises a first
一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法，包括如下步骤：A preparation method of a stretch-resistant biaxially oriented polyamide film, comprising the steps of:
S1：对所有的原料采用加热的方法进行干燥，且原料的水分含量控制在800ppm以下，对于聚酰胺来说，干燥过程除了降低含水率外，也可进行充分结晶；S1: All raw materials are dried by heating, and the moisture content of the raw materials is controlled below 800 ppm. For polyamide, in addition to reducing the moisture content, the drying process can also be fully crystallized;
S2：将第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3的原料分别按配方比例混合，并通过高速搅拌机分散均匀，然后通过各自的挤出机在250℃的温度下熔融塑化挤出，经过衣架式模头流出熔体；S2: Mix the raw materials of the first
S3：采用低压气刀将熔体贴附在温度为20℃的冷辊上形成厚度为120μm的厚片；S3: use a low-pressure air knife to attach the melt to a cold roll with a temperature of 20°C to form a thick sheet with a thickness of 120 μm;
S4：将厚片通过温度为55℃的辊筒进行预热；S4: Preheat the thick sheet through a roller with a temperature of 55°C;
S5：将预热的厚片经过纵向拉伸和横向拉伸形成薄膜，其中拉伸温度为80℃；拉伸比为1.62*1.66；S5: The preheated thick sheet is stretched longitudinally and transversely to form a film, wherein the stretching temperature is 80°C; the stretching ratio is 1.62*1.66;
S6：将拉伸后的薄膜进行热定型处理，定型温度为220℃，定型时间为10s，热定型处理完成后再进行冷却和电晕处理，电晕处理功率为8W，并收卷，即得到抗拉伸的双向拉伸聚酰胺薄膜；S6: The stretched film is subjected to heat setting treatment, the setting temperature is 220°C, and the setting time is 10s. After the heat setting treatment is completed, cooling and corona treatment are performed. The corona treatment power is 8W, and the winding is obtained. Stretch-resistant biaxially oriented polyamide film;
S7：对收卷后的抗拉伸的双向拉伸聚酰胺薄膜按要求进行分切。S7: slitting the stretch-resistant biaxially oriented polyamide film after winding as required.
实施例3Example 3
一种抗拉伸的双向拉伸聚酰胺薄膜，所述抗拉伸的双向拉伸聚酰胺薄膜的整体厚度为20μm，其包括第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3，所述聚酰胺层2设置在所述第一抗拉伸层1和所述第二抗拉伸层3之间，所述第一抗拉伸层1和所述第二抗拉伸层3的厚度相同，所述第一抗拉伸层1和所述第二抗拉伸层3均由聚酰胺层2和抗拉伸添加剂构成。An anti-stretch biaxially oriented polyamide film, the overall thickness of the anti-stretch biaxially oriented polyamide film is 20 μm, which comprises a first
一种抗拉伸的双向拉伸聚酰胺薄膜的制备方法，包括如下步骤：A preparation method of a stretch-resistant biaxially oriented polyamide film, comprising the steps of:
S1：对所有的原料采用加热的方法进行干燥，且原料的水分含量控制在800ppm以下，对于聚酰胺来说，干燥过程除了降低含水率外，也可进行充分结晶；S1: All raw materials are dried by heating, and the moisture content of the raw materials is controlled below 800 ppm. For polyamide, in addition to reducing the moisture content, the drying process can also be fully crystallized;
S2：将第一抗拉伸层1、聚酰胺层2和第二抗拉伸层3的原料分别按配方比例混合，并通过高速搅拌机分散均匀，然后通过各自的挤出机在260℃的温度下熔融塑化挤出，经过衣架式模头流出熔体；S2: Mix the raw materials of the first
S3：采用低压气刀将熔体贴附在温度为30℃的冷辊上形成厚度为140μm的厚片；S3: use a low-pressure air knife to attach the melt to a cold roll with a temperature of 30°C to form a thick sheet with a thickness of 140 μm;
S4：将厚片通过温度为60℃的辊筒进行预热；S4: Preheat the thick sheet through a roller with a temperature of 60°C;
S5：将预热的厚片经过纵向拉伸和横向拉伸形成薄膜，其中拉伸温度为99℃；拉伸比为1.64*1.68；S5: The preheated thick sheet is stretched longitudinally and transversely to form a film, wherein the stretching temperature is 99°C; the stretching ratio is 1.64*1.68;
S6：将拉伸后的薄膜进行热定型处理，定型温度为240℃，定型时间为12s，热定型处理完成后再进行冷却和电晕处理，电晕处理功率为10W，并收卷，即得到抗拉伸的双向拉伸聚酰胺薄膜；S6: The stretched film is subjected to heat setting treatment, the setting temperature is 240°C, and the setting time is 12s. After the heat setting treatment is completed, cooling and corona treatment are carried out. The corona treatment power is 10W, and the winding is obtained. Stretch-resistant biaxially oriented polyamide film;
S7：对收卷后的抗拉伸的双向拉伸聚酰胺薄膜按要求进行分切。S7: slitting the stretch-resistant biaxially oriented polyamide film after winding as required.
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。Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.
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