CN110946025A - 一种红外吸收保温膜及其制备方法 - Google Patents
一种红外吸收保温膜及其制备方法 Download PDFInfo
- Publication number
- CN110946025A CN110946025A CN201911115487.7A CN201911115487A CN110946025A CN 110946025 A CN110946025 A CN 110946025A CN 201911115487 A CN201911115487 A CN 201911115487A CN 110946025 A CN110946025 A CN 110946025A
- Authority
- CN
- China
- Prior art keywords
- film
- layer
- insulation film
- infrared
- outer layer
- 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
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- 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
-
- 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
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- 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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
-
- 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
- B32B2410/00—Agriculture-related articles
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Greenhouses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
本发明属于农用薄膜制备技术领域,涉及一种薄膜,尤其是一种红外吸收保温膜及其制备方法;包括至少一外层、一中层和一内层的共挤复合膜结构;外层包括PE,中层包括添加有保温剂的PE,内层包括PE以及涂覆层;一种红外吸收保温膜的制备方法,将上述外层、中层以及内层原料配料,通过共挤吹膜设备的螺杆混合并挤出塑化成熔体;过滤器过滤,经流道分流到模头,挤出复合成膜本发明的红外吸收保温膜能有效地吸收并反射远红外光,从而有效地避免因远红外热能辐射而降低大棚温度。同时,由于保温膜中添加的红外光吸收材料具有一定的散射效应,入射光经过本发明的保温薄膜后部分光线产生漫射,从而解决了大棚内“阴影”问题,使得大棚内的作物能获得均匀的光合作用,促进了作物的均衡生长。
Description
技术领域
本发明属于农用薄膜制备技术领域,涉及一种薄膜,尤其是一种红外吸收保温膜及其制备方法。
背景技术
我国功能性农膜是上世纪70年代末在普通棚膜的基础上发展起来的。目前用于农用保温大棚的薄膜多数是多层塑料薄膜,因为塑料膜具有良好的保温效果,加上薄膜内充填有隔热的空气,即使在寒冷的季节里,白天因太阳光照射的加热效应,薄膜棚内也可以保持很高的气温,利于作物的生长。但是到了夜间或没有太阳光照射时,在昼夜温差大的情况下,棚内由于热量的散失,从而温度会下降很多,不利于作物的生长。
由于大棚内热量的散失主要是通过远红外辐射效应引起的,因此,本领域的技术人员致力于开发一种能有效地避免因远红外热能辐射而降低棚温的保温膜。
发明内容
为了解决以上的技术问题,本发明提供一种红外吸收保温膜;
本发明是这样实现的:
一种红外吸收保温膜,包括至少一外层、一中层和一内层的共挤复合膜结构;外层包括PE,中层包括添加有保温剂的PE,内层包括PE以及涂覆层。
进一步的,保温剂包括碳酸钙、水滑石、硅藻土、滑石粉中的一种或多种。
进一步的,涂覆层包括水性流滴消雾涂覆液。
进一步的,保温剂占所述中层重量比为3.0~8.0%。
进一步的,保温膜的内层和/或中层和/或外层还含有功能母料,所述功能母料选自光稳定剂、抗氧化剂中的一种或多种。
进一步的,光稳定剂和抗氧化剂的添加重量比例分别为3~8%、6~12%。
进一步的,保温剂以用LDPE或LLDPE作载体的抗红外母料方式添加。
进一步的,保温剂在所述载体中的质量比为40~60%。
本发明还提供了一种制备方法,用于制备红外吸收保温膜,以下是技术方案:
一种红外吸收保温膜的制备方法,将上述外层、中层以及内层原料配料,通过共挤吹膜设备的螺杆混合并挤出塑化成熔体;过滤器过滤,经流道分流到模头,挤出复合成膜。
进一步的,保温剂以用LDPE或LLDPE作载体的抗红外母料方式进行添加。
上述方案的有益效果:
本发明所添加的红外吸收材料属于无机低分子材料,由于其粒径为1~20μm,且其产生同PE基材有相近的折光率(PE折光率约为1.51),所以薄膜的透光性能不会因其加入而有较大影响,但其却对远红外光有良好的吸收反射能力,从而能有效地避免远红外热辐射流失而致棚温下降,达到温室大棚夜间保温的目的。
本发明的红外吸收保温膜能有效地吸收并反射远红外光,从而有效地避免因远红外热能辐射而降低大棚温度。同时,由于保温膜中添加的红外光吸收材料具有一定的散射效应,入射光经过本发明的保温薄膜后部分光线产生漫射,从而解决了大棚内“阴影”问题,使得大棚内的作物能获得均匀的光合作用,促进了作物的均衡生长。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本发明的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1为本发明结构示意图;
100、外层;200、次外层;300、中层;400、次内层;500、内层。
具体实施方式
下面将结合附图对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例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。
在本发明的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。
一种红外吸收保温膜,包括至少一外层、一中层和一内层的共挤复合膜结构;外层包括PE,中层包括添加有保温剂的PE,内层包括PE以及涂覆层。
一种红外吸收保温膜的制备方法,将上述外层、中层以及内层原料配料,通过共挤吹膜设备的螺杆混合并挤出塑化成熔体;过滤器过滤,经流道分流到模头,挤出复合成膜。
实施例一
参阅图1,图1为本发明提供的一种多层转光膜,如图1所示,
薄膜为五层结构,包括外层、次外层、中层、次内层以及内层。其中外层以及次外层材料一致、组分相同。
一种包括外层、次外层、中层、次内层以及内层的五层共挤复合膜结构的红外吸收保温膜。其中,外层和次外层材质为添加有12%抗氧化剂、8%光稳定剂和PE,中层材料为添加有8%的保温剂的PE,次内层为添加有12%抗氧化剂、8%光稳定剂的PE,内层为添加有10%水性流滴消雾涂覆液、12%抗氧化剂、8%光稳定剂的PE。
在本实施例中,保温剂为选用LDPE作载体的水滑石,且保温剂在LDPE中的质量比为45%。
传统的未添加保温剂的薄膜相比,本发明的保温膜可以达到降温保温效果。并且实践发现,由于该保温膜制作时结合使用了水性流滴消雾涂覆液、保温剂以及抗氧化剂等,所制得的保温膜还具有有效抑制作物病虫害活动、降低夏季棚温和耐老化的功能。
实施例二
一种包括外层、次外层、中层、次内层以及内层的五层共挤复合膜结构的红外吸收保温膜。其中,外层和次外层材质为添加有10%抗氧化剂、6%光稳定剂和PE,中层材料为添加有8%的保温剂的PE,次内层为添加有10%抗氧化剂、6%光稳定剂的PE,内层为添加有10%水性流滴消雾涂覆液、10%抗氧化剂、6%光稳定剂的PE。
在本实施例中,保温剂为选用LDPE作载体的水滑石,且保温剂在LDPE中的质量比为55%。
与传统的未添加红外吸收保温剂的薄膜相比,本发明的保温膜可以达到夜间保温效果。并结合使用了水性流滴消雾涂覆液、保温剂以及抗氧化剂等,所制得的保温膜具有明显的降温效果,实现了“冬暖夏凉”,非常适合高辐射及高纬度地区使用,同时也具有有效抑制作物病虫害活动、降低棚温和耐老化的功能。
以上实施例中,光稳定剂包括水杨酸苯酯、水杨酸对叔丁基苯酯、间苯二酚但苯甲酸酯、2,4-二羟基二苯甲酮、2-羟基-4-甲氧基二苯甲酮、双酚A双水杨酸酯、2-羟基-4-甲氧基-二苯甲酮-5-磺酸、(2,2,6,6-四甲基-4-哌啶)亚胺、丁二酸与4-羟基-2,2,6,6-四甲基-1-哌啶醇的聚合物、癸二酸双-2,2,6,6-四甲基哌啶醇酯中的一种或几种。
抗氧化剂包括抗氧剂168、抗氧剂1010、抗氧剂1076、抗氧剂2246、抗氧剂300、抗氧剂330、抗氧剂3114、抗氧剂245、2,6-二叔丁基对甲酚、2,4,6-三叔丁基苯酚中的一种或几种。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种红外吸收保温膜,其特征在于,所述保温膜至少包括一外层、一中层和一内层的共挤复合膜结构;所述外层包括PE,所述中层包括添加有保温剂的PE,内层包括PE以及涂覆层。
2.根据权利要求1所述的红外吸收保温膜,其特征在于所述保温剂包括碳酸钙、水滑石、硅藻土、滑石粉中的一种或多种。
3.根据权利要求1所述的红外吸收保温膜,其特征在于,所述所述涂覆层包括水性流滴消雾涂覆液。
4.如权利要求2所述的红外吸收保温膜,其特征在于,所述保温剂占所述中层重量比为3.0~8.0%。
5.如权利要求1所述的红外吸收保温膜,其特征在于,所述保温膜的内层和/或中层和/或外层还含有功能母料,所述功能母料选自光稳定剂、抗氧化剂中的一种或多种。
6.如权利要求5所述的红外吸收保温膜,其特征在于,所述光稳定剂和抗氧化剂的添加重量比例分别为6~12%、和3~8%。
7.如权利要求1所述的红外吸收保温膜,其特征在于,所述保温剂以用LDPE或LLDPE作载体的抗红外母料方式添加。
8.如权利要求7所述的红外吸收保温膜,其特征在于,所述保温剂在所述载体中的质量比为40~60%。
9.一种红外吸收保温膜的制备方法,其特征在于,将权利要求1~8外层、中层以及内层原料配料,通过共挤吹膜设备的螺杆混合并挤出塑化成熔体;过滤器过滤,经流道分流到模头,挤出复合成膜。
10.根据权利要求9所述的红外吸收保温膜的制备方法,其特征在于,所述保温剂以用LDPE或LLDPE作载体的抗红外母料方式进行添加。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911115487.7A CN110946025A (zh) | 2019-11-14 | 2019-11-14 | 一种红外吸收保温膜及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911115487.7A CN110946025A (zh) | 2019-11-14 | 2019-11-14 | 一种红外吸收保温膜及其制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN110946025A true CN110946025A (zh) | 2020-04-03 |
Family
ID=69977275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911115487.7A Pending CN110946025A (zh) | 2019-11-14 | 2019-11-14 | 一种红外吸收保温膜及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110946025A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111823532A (zh) * | 2020-07-17 | 2020-10-27 | 甘肃福雨塑业有限责任公司 | 一种农用多功能水晶po转光大棚膜及其制备方法 |
-
2019
- 2019-11-14 CN CN201911115487.7A patent/CN110946025A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111823532A (zh) * | 2020-07-17 | 2020-10-27 | 甘肃福雨塑业有限责任公司 | 一种农用多功能水晶po转光大棚膜及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102756522B (zh) | 紫外线阻隔温室膜 | |
CN102848683B (zh) | 一种涂覆型转光膜及其制备方法 | |
CN1836898A (zh) | 一种温室用光反射多功能复合薄膜及其制备方法 | |
CN104086928B (zh) | 一种智能调光玻璃用的组合物 | |
US4423164A (en) | Polymeric films for use in agriculture | |
CN110978700A (zh) | 一种漫散射膜及其制备方法 | |
JPS61111341A (ja) | 温室用プラスチツクシ−ト | |
CN1009793B (zh) | 防止虫害的覆盖薄膜 | |
CN102756521A (zh) | 红外吸收保温膜 | |
CN110946025A (zh) | 一种红外吸收保温膜及其制备方法 | |
FI60130B (fi) | Solkammare med en skiva som slaepper igenom dorno-straolar | |
CN103832032B (zh) | 三层共挤eva复合流延膜的制造方法 | |
CN102754575A (zh) | 一种防虫降温膜 | |
CN110978690A (zh) | 一种防虫膜及其制备方法 | |
CN110978697A (zh) | 一种转光膜、多层转光膜及其多层转光膜制备方法 | |
US5585418A (en) | Greenhouse film having variable light diffusion properties | |
CN107353475A (zh) | 一种抗灼伤双层共挤内镶式滴灌带及其制备方法 | |
JP3268738B2 (ja) | 農業用遮熱シート | |
CN207869837U (zh) | 一种农用塑料薄膜 | |
US20060116461A1 (en) | Heat shielding materials for use in agricultural and horticultural facilities | |
EP3569410B1 (en) | Agriculture covering film for greenhouses with high ir effectiveness, and shielding effect to n.i.r. radiations, gained with utilization of hollow glass microspheres, and relevant production method | |
CN110432037B (zh) | 一种农用大棚复合薄膜及其制备方法 | |
CN110920182A (zh) | 一种隔热透明降温膜及其制备方法 | |
CN111002682A (zh) | 一种转光膜、多层转光膜及其多层转光膜制备方法 | |
CN110978701A (zh) | 一种青苔抑制薄膜、多层青苔抑制薄膜及其制备方法 |
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 |