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WO2012091387A2 - Film multicouche servant à bloquer le rayonnement infrarouge - Google Patents

Film multicouche servant à bloquer le rayonnement infrarouge Download PDF

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Publication number
WO2012091387A2
WO2012091387A2 PCT/KR2011/010109 KR2011010109W WO2012091387A2 WO 2012091387 A2 WO2012091387 A2 WO 2012091387A2 KR 2011010109 W KR2011010109 W KR 2011010109W WO 2012091387 A2 WO2012091387 A2 WO 2012091387A2
Authority
WO
WIPO (PCT)
Prior art keywords
multilayer film
film
resin layer
infrared
infrared blocking
Prior art date
Application number
PCT/KR2011/010109
Other languages
English (en)
Korean (ko)
Other versions
WO2012091387A3 (fr
Inventor
박형석
손병국
신대용
주천용
Original Assignee
에스케이씨 주식회사
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 에스케이씨 주식회사 filed Critical 에스케이씨 주식회사
Publication of WO2012091387A2 publication Critical patent/WO2012091387A2/fr
Publication of WO2012091387A3 publication Critical patent/WO2012091387A3/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation

Definitions

  • the present invention relates to a multilayer film having a higher blocking rate in a wider infrared range than an existing infrared blocking film that can be applied to an exterior glass of a building or an automobile.
  • Background Art Recently, several films have been proposed to lower the room temperature by blocking heat energy from the sun.
  • an object of the present invention is to provide an infrared blocking film having a high blocking rate in a wide range of infrared rays and a low reflectance of visible light.
  • the present invention is to provide an infrared blocking film having a high blocking rate in a wide range of infrared rays and a low reflectance of visible light.
  • each film stack includes a reflective layer and a protective layer provided on both sides of the reflective layer, and the reflective layer is polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • a second resin layer comprising polymethyl methacrylate (PMMA), copolymerized polyethylene terephthalate (co-PET), polyethylene naphthalate (PEN), or a mixture of these polymers.
  • PMMA polymethyl methacrylate
  • co-PET copolymerized polyethylene terephthalate
  • PEN polyethylene naphthalate
  • an infrared ray blocking multilayer film having an average reflectance of at least 50% in the wavelength range of 900-1 and 300 nm of the entire film.
  • FIG. 1 is a cross-sectional view of an infrared blocking multilayer film according to an example of the present invention.
  • 1 is a cross-sectional view showing an example of an infrared ray blocking film according to the present invention, when described with reference to this, the infrared ray blocking multilayer film of the present invention is composed of two or more film stacks (1, 2), each film stack is a reflective layer (la a 2a) and protective layers (lb, 2b) laminated on both surfaces of the reflective layer.
  • Each of the reflective layers lb, 2b has a configuration in which the first resin layers 1-1, 2-1 and the second resin layers 1-2, 2-2 are alternately stacked in two or more layers in the thickness direction. .
  • various physical property values must be satisfied. Especially, the required physical properties are necessary due to the blocking rate and the characteristics of light in the IR region. Higher order reflection or nth order reflection that occurs.
  • the average reflectance for the 900 ⁇ 1300nm range which is a region where heat is substantially present in the infrared region (800 ⁇ 2500nm) needs to be 50% or more.
  • the film of the present invention is characterized in that the average reflectance is 50% or more in the infrared wavelength region of 900 ⁇ l, 300nm, preferably the average reflectance in the wavelength range is 70% or more, more preferably 80% or more. .
  • the infrared blocking multilayer film includes a first film stack and a second film stack, and the average reflectance over a wavelength range of 900 nm to 1,000 nm of the first film stack is 50% or more, and the second film It can be configured that the average reflectance over the wavelength range of l, 000 ⁇ l, 300nm of the stack is 50% or more.
  • the film of the present invention may have an average reflectance of visible light (400 ⁇ 780nm) is preferably less than 40% and more preferably less than 20%.
  • the first resin layer constituting the reflective layer contains PET
  • the second resin layer contains PMMA, co-PET, PEN, or a mixed polymer thereof.
  • the PET has a degree of crystallization of 03 ⁇ 4 to 80%, more preferably 10% to 70%, and most preferably 40% to 60%.
  • the co-PET is preferably a copolymer of ethylene glycol (EG) and neopentyl glycol (NPG) as a glycol component, for example, the content of NPG in the glycol component may be copolymerized to 5 ⁇ 80 ⁇ 13 ⁇ 4, preferably Preferably it is 10-30 mol%, It is good to copolymerize with 15-25 mol% most preferably.
  • EG ethylene glycol
  • NPG neopentyl glycol
  • the protective layer preferably comprises PET.
  • the weight ratio of a 1st resin layer and a 2nd resin layer is 1.5: 1-1: 1.5.
  • an individual resin layer constituting the reflective layer (first resin layer) Or the second resin layer) is preferably 50nm to 800nm, more preferably 60nm to 200nm.
  • the thickness of a 1st resin layer and a 2nd resin layer is comprised differently,
  • stacked alternately is 1: 0.3-1: 2 days.
  • the average thickness of the first resin layer is 50 nm to 200 nm, and the average thickness of the second resin layer is 60 nm to 300 nm.
  • the thicknesses of the first resin layer and the second resin layer alternately stacked in the reflective layer may be configured to be constant, or may be configured to gradually increase or decrease. When laminating to a certain thickness, it is possible to increase the reflectance in the infrared region, and when the thickness is changed, the reflecting region ( ⁇ ) of the infrared rays can be widened.
  • the total thickness of the reflective layer is preferably to lOO ⁇ m
  • the thickness of the protective layer is preferably ⁇ to 30, particularly preferably 3.5 / m to 15.0. By making the thickness of a protective layer into the said range, the interlayer uniformity of a reflective layer can be maintained.
  • the infrared blocking multilayer film of the present invention comprises at least two film stacks (eg, first film stack and second film stack), and the total thickness thereof is preferably different from each other, preferably the first film stack and the first film stack
  • the thickness ratio of the 2 film stacks is 1: 1.1-1: 3, More preferably, it is 1: 1.1-1: 2, Most preferably, it is 1: 1.1-1: 1.5.
  • An example of the infrared blocking multilayer film of the present invention includes a system film stack and a film stack, wherein the average thickness of the first resin layer in the first film stack is 70 to 120 nm and the average thickness of the system resin layer 2 is It is 110-130 nm, the average thickness of the 1st resin layer in a said 2nd film stack is 110-160 nm, and the average thickness of a system 2 resin layer is 150-L90 nm.
  • stacking such many film stacks is not specifically limited, It is preferable that it is 10-100 / m, and it is more preferable that it is 20 / kPa-80.
  • the first resin layer and the second resin layer include different polymers having different refractive indices so that the difference in refractive index becomes 0.05 or more.
  • the film of the present invention can be biaxially stretched to further increase the refractive index difference between the resin layers, wherein the stretching ratio in the longitudinal and transverse directions is preferably 2.0 times to 5.0 times, and more preferably 3.0 times to 4.5 times. .
  • the film stack constituting the film of the present invention can be formed at the bottom of the feed block constituting the multilayer.
  • each reflective layer is preferably composed of 50 to 400 layers, more preferably 70 to 250 layers.
  • the reflecting layer By setting the reflecting layer within the above range, the phenomenon in which color can be suppressed by minimizing the reflectance in the visible light region can be suppressed, and a high reflectance can be obtained at a wavelength of 900-1300 nm in the infrared region.
  • Such an infrared blocking multilayer film of the present invention exhibits a higher infrared ray blocking rate in a wider infrared region than in the prior art, and does not include a metal material, so that the transmittance in the visible ray region is high and hardly exhibits color.
  • Infrared shielding film can be used to reduce energy consumption in summer or to prevent heat loss during winter.
  • PET resin with a crystallinity of 75% or more as the first resin (40-60D under vacuum air conditioning at 120 ° C for at least 2 hours, vacuum air conditioning at 180 ° C for at least 3 hours, and then melted and extruded at about 200-300 ° C.
  • a resin layer was prepared, and a second resin layer was prepared by melting and extruding PMMA resin at a temperature of about 200 to 260 ° C. as a second resin.
  • the first resin layer and the second resin layer are alternately stacked by using a multilayer feed block, and the weight ratio of the first resin layer and the second resin layer is maintained at 1: 1.1, and the amount of extrusion is controlled so that both outer layers are It became a 2nd resin layer, and the reflection layer which consists of a total of 93 layers was formed. Thereafter, PET film was coated on both surfaces of the prepared reflective layer to form a protective layer, thereby completing the film stack.
  • Step 2) Distribute the Stack
  • the first film stack and the second film stack are made by dividing the prepared film stack in a lengthwise direction using a stack distributor, and the thickness of the first film stack is changed by using a device having an outlet thickness ratio of 1: 1.5. After it was laminated to a second film stack, a total of 190 layers of multilayer film were completed through the die.
  • the obtained multilayer film was stretched 3.5 times in the longitudinal direction and 4.5 times in the transverse direction.
  • the total thickness of the final prepared multi-layer film was and the thicknesses of the system 1 film stack and the second film stack were 18 / m and 27, respectively.
  • the average thickness of the first resin layer constituting the reflective layer of the first film stack was about llOnm
  • the average thickness of the second resin layer was about 120 nm
  • the average thickness of the first resin layer constituting the reflective layer of the crab 2 film stack Is about It was 150 nm and the average thickness of the crab 2 resin layer was about 160 nm.
  • the total thickness of the finally produced multilayer film was 45 1, and the thicknesses of the system 1 film stack and the second film stack were 18 and respectively.
  • the average thickness of the first resin layer constituting the reflective layer of the first film stack was about 100 nm and the average thickness of the second resin layer was about 130 nm
  • the average thickness of the first resin layer constituting the reflective layer of the second film stack was Was about 130 nm and the average thickness of the crab 2 resin layer was about 180 nm.
  • the total thickness of the finally produced multilayer film was 45, and the thicknesses of the first film stack and the second film stack were 18 and respectively.
  • the average thickness of the first resin layer constituting the reflective layer of the first film stack was about 130 nm and the average thickness of the second resin layer was about 100 nm
  • the average thickness of the first resin layer constituting the reflective layer of the second film stack was Was about 180 nm and the average thickness of the second resin layer was about 130 nm.
  • Example 5 Except for using a co-PET resin instead of PMMA resin in the reflective layer, it was prepared according to the same procedure as in step 1) to 3) of Example 1.
  • Example 5 Except for using a co-PET resin instead of PMMA resin in the reflective layer, it was prepared according to the same procedure as in step 1) to 3) of Example 1.
  • Example 2 Except for changing the weight ratio of PET resin and PMMA resin to 1: 2 in the reflective layer, it was prepared according to the same procedure as in step 1) to 3) of Example 1.
  • the total thickness of the finally produced multilayer film was 45, and the thickness of the system 1 film stack and the second film stack was and 27 m, respectively.
  • the average thickness of the first resin layer was about 90 nm
  • the average thickness of the second resin layer was about 140 nm
  • the average thickness of the first resin layer constituting the reflective layer of the second film stack. Was about 120 nm and the average thickness of the second resin layer was about 200 nm. Comparative Example 2
  • Example 1 Except for changing the weight ratio of PET resin and PMMA resin to 2: 1 in the reflective layer, it was prepared in the same procedure as in Step 1) to 3) of Example 1.
  • the total thickness of the finally produced multilayer film was 4 ffli, and the thickness of the system 1 film stack and the second film stack was 18 m and 27 // m, respectively.
  • the average thickness of the first resin layer constituting the reflective layer of the first film stack was about 140 nm
  • the average thickness of the second resin layer was about 90 nm
  • the average thickness of the first resin layer constituting the reflective layer of the second film stack. was about 200 nm and the average thickness of the second resin layer was about 120 nm. Comparative Example 3
  • the infrared blocking multilayer film of the present invention according to the embodiment can be seen that the infrared blocking rate in the 900 ⁇ 1,300nm region as well as in the 900 ⁇ 1,300nm region is excellent.
  • the conventional infrared blocking film according to the comparative example can be seen that the infrared blocking rate is low in the 900-1, 300nm region or the visible light reflectance is high color.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)
  • Optical Filters (AREA)

Abstract

La présente invention concerne un film multicouche servant à bloquer le rayonnement infrarouge, comprenant au moins deux empilements de films, chacun constitué de couches protectrices sur les deux faces d'une couche réfléchissante. Des premières couches de résine et des secondes couches de résine sont empilées en alternance, la première couche de résine comprenant un poly(téréphtalate d'éthylène) et la seconde couche de résine comprenant un poly(méthacrylate de méthyle), un copolymère de poly(téréphtalate d'éthylène), un poly(naphtalate d'éthylène) ou un copolymère comprenant leur mélange. Le film multicouche servant à bloquer le rayonnement infrarouge possède une réflectance moyenne supérieure ou égale à 50 % dans une bande de longueurs d'onde allant de 900 nm à 1300 nm, un facteur de transmission élevé dans la gamme de la lumière visible et, par rapport aux films classiques, un taux de blocage du rayonnement infrarouge élevé sur une région infrarouge plus large. Par conséquent, le film multicouche servant à bloquer le rayonnement infrarouge être utilisé pour les verres d'extérieur destinés aux bâtiments ou aux automobiles, pour ainsi permettre une réduction de la consommation d'énergie.
PCT/KR2011/010109 2010-12-27 2011-12-26 Film multicouche servant à bloquer le rayonnement infrarouge WO2012091387A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0135606 2010-12-27
KR1020100135606A KR101740603B1 (ko) 2010-12-27 2010-12-27 적외선 차단 다층 필름

Publications (2)

Publication Number Publication Date
WO2012091387A2 true WO2012091387A2 (fr) 2012-07-05
WO2012091387A3 WO2012091387A3 (fr) 2012-10-11

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KR (1) KR101740603B1 (fr)
WO (1) WO2012091387A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102238632B1 (ko) * 2014-06-18 2021-04-12 미래나노텍(주) 적외선 반사필름 조성물, 이를 포함하는 적외선 반사필름 및 그 제조방법
KR20170008951A (ko) 2015-07-15 2017-01-25 코오롱인더스트리 주식회사 자외선 및 적외선 안정성을 가지는 단층 폴리에스테르 필름
KR102615941B1 (ko) 2016-07-29 2023-12-20 삼성전자 주식회사 적외선 차단 필터 및 이를 구비하는 카메라 또는 전자 장치
KR102027575B1 (ko) * 2017-08-30 2019-10-01 에스케이씨 주식회사 자외선 차단 기능을 갖는 적외선 차단 다층 필름
KR102001496B1 (ko) 2017-12-13 2019-07-18 에스케이씨 주식회사 적외선 차단 다층 필름
KR102317707B1 (ko) * 2019-01-10 2021-10-26 에스케이씨 주식회사 다층 반사 필름
KR20220164977A (ko) 2021-06-07 2022-12-14 주식회사 펀스케이프 적외선 차단 도료 제조 방법 및 적외선 차단 도료로 도장한 놀이기구
WO2023090717A1 (fr) * 2021-11-19 2023-05-25 롯데케미칼 주식회사 Film multicouche de refroidissement par rayonnement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6157490A (en) * 1998-01-13 2000-12-05 3M Innovative Properties Company Optical film with sharpened bandedge
WO2002061469A2 (fr) * 2001-01-15 2002-08-08 3M Innovative Properties Company Film reflecteur infrarouge a multiples couches presentant un coefficient de transmissibilite eleve et lisse dans la zone des longueurs d'ondes visibles et articles lamines fabriques a partir de ces couches
JP2003002985A (ja) 2001-06-21 2003-01-08 Teijin Ltd 近赤外線遮蔽フィルム及びそれを用いた積層体
KR101084516B1 (ko) * 2003-10-27 2011-11-18 데이진 듀폰 필름 가부시키가이샤 근적외선 차폐 필름
JP2005189742A (ja) 2003-12-26 2005-07-14 Toyobo Co Ltd 近赤外線吸収フィルター

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Publication number Publication date
WO2012091387A3 (fr) 2012-10-11
KR101740603B1 (ko) 2017-05-29
KR20120073753A (ko) 2012-07-05

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