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WO2019197805A1 - Film polymère - Google Patents

Film polymère Download PDF

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Publication number
WO2019197805A1
WO2019197805A1 PCT/GB2019/050997 GB2019050997W WO2019197805A1 WO 2019197805 A1 WO2019197805 A1 WO 2019197805A1 GB 2019050997 W GB2019050997 W GB 2019050997W WO 2019197805 A1 WO2019197805 A1 WO 2019197805A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
light
layer
greenhouse
blocking
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.)
Ceased
Application number
PCT/GB2019/050997
Other languages
English (en)
Inventor
Kenneth Gargan
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.)
British Polythene Ltd
Original Assignee
British Polythene 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
Priority claimed from GBGB1806049.1A external-priority patent/GB201806049D0/en
Priority claimed from GBGB1819802.8A external-priority patent/GB201819802D0/en
Application filed by British Polythene Ltd filed Critical British Polythene Ltd
Publication of WO2019197805A1 publication Critical patent/WO2019197805A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • 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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • 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
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • B32B2307/414—Translucent
    • 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
    • B32B2307/514—Oriented
    • 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
    • B32B2307/70—Other properties
    • B32B2307/764—Insect repellent
    • 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
    • B32B2323/00—Polyalkenes
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • Y02A40/146—Genetically Modified [GMO] plants, e.g. transgenic plants
    • 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

Definitions

  • the present invention relates generally to a polymer film for modifying solar light and particularly, although not exclusively, to greenhouse and greenhouse-like structures which includes covering materials that protect plants from external climate conditions and diseases, create optimal growth microenvironments, and offer a flexible solution for sustainable and efficient year-round cultivation.
  • plastic films can be tailored specifically to the unique light and temperature requirements of many field-grown plants including fruits and vegetables. At the same time, plastic films can help to reduce water consumption by reducing evaporation.
  • UV light-protection components added to prolong the life of the material and maintain high levels of transmission of photosynthetically active radiation (PAR).
  • the commonly used UV protection chemicals include UV absorber or blocker and light stabiliser.
  • absorbers When absorbers are used standard greenhouse films generally block the majority of UV light transmission at wavelengths below 360nm. Some absorbers block a greater proportion of the UV light spectrum by blocking transmission below 380nm.
  • Insects are known to“see” in certain wavelength range.
  • films containing UV absorbers have been marketed as insect control films in the past.
  • Studies have previously reported a reduction in insect populations grown under ⁇ 380nm conditions compared to ⁇ 360nm.
  • the presumed method of action is alteration of normal solar wavelength patterns, especially the violet-blue light range (400- 490nm), used by insects during orientation and flight using engineered flexible greenhouse films.
  • the present invention provides a polymer film for modifying solar light, the film being capable of at least partially blocking the solar spectrum up to and/or within a wavelength and/or wavelength band in the 400-490nm violet-blue range.
  • the present invention also provides a plastic film capable of at least partially blocking the electromagnetic spectrum up to and/or within a wavelength and/or wavelength band in the 400-490nm range.
  • the present invention also provides a greenhouse film that is capable of at least partially blocking the solar spectrum up to a wavelength in the 400-490nm violet-blue range.
  • the present invention also provides a greenhouse film that is capable of at least partly blocking the region of the solar spectrum around and/or up to a wavelength in the range 400-490nm.
  • the present invention also provides a polyethylene-based multilayer greenhouse film that is capable of blocking the 400-440nm violet region of the solar spectrum.
  • the present invention also provides a polyethylene-based multilayer greenhouse film that is capable of blocking the 450-490nm blue region of the solar spectrum.
  • the present invention also provides a violet light-blocking insect control film which absorbs violet light around and/or up to approximately: 400nm, 41 Onm 420nm, 430nm or 440nm.
  • the present invention also provides a blue light-blocking insect control film which absorbs blue light around and/or up to approximately: 450nm, 460nm 470nm, 480nm or 490nm.
  • the present invention also provides a greenhouse film having a yellow colour that is capable of at least partly blocking the region of the solar spectrum around and/or up to a wavelength in the range 400- 490nm.
  • the present invention also provides a greenhouse film having a yellow colour that is capable of at least partially blocking the solar spectrum up to a wavelength in the range 400-490nm.
  • the present invention also provides a polyethylene-based multilayer greenhouse film having a yellow colour that is capable of blocking the 400-490nm region of the solar spectrum.
  • the present invention also provides a violet light-blocking film which absorbs the violet light in the solar radiation around and/or up to approximately: 400nm, 41 Onm 420nm, 430nm, or 440nm.
  • the present invention also provides a blue light-blocking film which absorbs the blue light in the solar radiation around and/or up to approximately: 450nm, 460nm, 470nm, 480nm, or 490nm.
  • the film blocks all violet light wavelengths up to and including 400nm, 41 Onm 420nm, 430nm, or 440nm.
  • the film blocks all blue light wavelengths up to and including 450nm, 460nm 470nm, 480nm, or 490nm.
  • the present invention may provide a multilayer polymer film for modifying solar violet-blue light.
  • the present invention provides a disease and insect control film which can contribute efficiently in integrated pest management systems and help to reduce the usage of pesticides. Reduction of the population of insects in greenhouses also reduces the viruses which are vectored by these insects.
  • the film blocks all violet-blue wavelengths up to and including 400nm, 4 I Onm 420nm, 430nm,440nm, 450nm, 460nm, 470nm, 480nm, or 490nm. In other embodiments a specific band of violet-blue wavelengths is blocked.
  • the film blocks violet light wavelengths up to around the 400-440nm range, for example 420-430nm.
  • additives are provided so that the film is configured to absorb the blue light (450- 490nm) of the spectrum.
  • Some embodiments provide a speciality greenhouse film which will perform as a regular greenhouse film, but in addition provides insect control properties.
  • the present invention also provides a polyethylene based multilayer greenhouse film that is capable of blocking the 400-490nm region of the solar spectrum.
  • the present invention provides a polyethylene based multilayer greenhouse film that is capable of blocking at least the 400-490nm region of the solar spectrum by 40- 100%.
  • the present invention provides a polyethylene based multilayer greenhouse film that is capable of blocking at least the 420-430nm region of the solar spectrum by 50- 100%.
  • the present invention provides or relates to a yellow greenhouse film (UV-blue blocking) which has high PAR transmittance.
  • the film may comprises a UV absorber.
  • the film may comprise UV blocker to block 350 nm-400 nm.
  • the film may be capable of increasing fruit yield.
  • the film may be capable of increasing fruit size and fruit number.
  • the film may be capable of reducing un-marketable and waste fruit number.
  • the film may be capable of reducing time required for fruit or flower to achieve mature stage.
  • the film may be a monolayer or a multi-layer.
  • the film has a multilayer structure.
  • the light modifier or blocker will be added to at least one layer.
  • the film may contain at least one layer of polyethylene.
  • the film may have UV protection for the, some or all layers.
  • UV absorber and pigment that result in blocking transmission in a wavelength region of interest.
  • a 7-layer film is composed of different types of polymer including LDPE and/or LLDPE.
  • the film thickness may be approximately 150 microns but could be thinner or thicker and maintain the same effect by adjusting the additive concentration.
  • UV absorbers such as BASF Tinuvin 326 block up to around 380nm.
  • Chimassorb 81 Another commonly used UV absorber is Chimassorb 81 which is a benzophenone type but only blocks up to approximately 350nm.
  • Tinuvin 326 is used to block transmission up to 380nm, combined with a yellow pigment that has a peak absorbance at 400nm.
  • the yellow pigment has a broad absorption band, so reduced transmission up to 500nm.
  • the film is still a functional greenhouse film. Adding a violet-blue light modifier will reduce the PAR light transmittance (which is a critical property for greenhouse film). In some embodiments the film has an overall light transmittance larger than 70%.
  • the film has an overall 550-750nm yellow-red light transmittance larger than 85%.
  • the film is formed using blow extrusion technology.
  • the polymers used could be any polyethylene types that are suitable for blown film production but could also contain non- polyethylene polymers such as ethylene vinyl acetate, polypropylene, polyamide, ethylene vinyl alcohol (EVOH), etc.
  • the film is formed using cast extrusion technology.
  • the polymers used could be any polyethylene types that are suitable for blown film production but could also contain nonpolyethylene polymers such as ethylene vinyl acetate, polypropylene, polyamide, ethylene vinyl alcohol (EVOH), etc.
  • the film will also pass certain physical standards as a greenhouse film, including tear resistance, puncture resistance, elongation, etc.
  • Components of layer/s of the film may comprise, consist of or include at least one of: LDPE; mLL; LLDPE; UV absorber; pigmented masterbatch; UV stabiliser; process aid; EVA.
  • LDPE for example a grade with very good toughness and biaxial shrink properties. Available, for example, from Sabic, Versalis or Carmel.
  • Metallocene ethylene-hexene (mLL) copolymer providing, for example outstanding tensile, impact strength and puncture. Available, for example, from Exxon, Chevron or Ineos.
  • Linear low density polyethylene (LLDPE) copolymer for example containing hexene- 1 as the comonomer. It may, for example offer some/all of the following properties: excellent impact strength and puncture resistance; high tear strength; good optical properties; good bubble stability; excellent sealability and hot-tack strength. Available, for example, from Ineos, Dow or Exxon.
  • LLDPE Linear low density polyethylene
  • a UV absorber which slows down the degradation process by absorbing UV radiation and dissipating it as thermal energy. Available, for example, from Ampacet, Schulman or Tosaf.
  • Yellow masterbatch with yellow pigment as a light modifier. Available, for example, from Gabriel Chemie. Pigments available, for example, from BASF.
  • a UV stabiliser used to prevent a chemical process referred to as "photo degradation” which occurs when ultraviolet radiation coming from an artificial light source or the sun collapses chemical bonds within a polymer available, for example, from Schulman, Tosaf or Ampacet.
  • Polymer processing aids are commonly used during the extrusion process to improve melt processability, improve handling of high molecular weight polymers, burning or anisotropy. They are first and foremost used to reduce the friction between melting mass and metal machine parts, enabling the smooth flow of the molten material. Available, for example, from Tosaf, Schulman or Ampacet. Ethylene vinyl acetate copolymer (EVA), for example 14% EVA for blown film extrusion may be used as an alternative resin. Available, for example, from Versalis or Exxon.
  • EVA Ethylene vinyl acetate copolymer
  • the film is aimed specifically at controlling Spotted Wing Drosophila (SWD), which is a type of fruit fly that lays its eggs into unripe fruit and has the potential to be very damaging to soft fruit crops in the UK and elsewhere.
  • SWD Spotted Wing Drosophila
  • blocking up to 430nm may be provided. That takes the requirements for such embodiments of present invention out of the range that conventional UV absorbers can block (290 - 385nm) and into the violet-blue region of the visible spectrum where a yellow pigment is needed.
  • UV absorbers are provided and in addition one or more pigments are provided.
  • a further aspect provides multi-layer greenhouse film, in which one or more of the layers include yellow pigment.
  • Yellow is the colour between orange and green on the spectrum of visible light. It is evoked by light with a dominant wavelength of roughly 570-590 nm.
  • the masterbatch may be a solid product in which pigments or additives are optimally dispersed at high concentration in a carrier material.
  • the carrier material is compatible with the main plastic/s in which it will be blended during moulding, whereby the final plastic product obtains the colour and/or properties from the masterbatch.
  • yellow pigments examples include: BASF Pigment Yellow 1 38; BASF Pigment Yellow 155; BASF Pigment Yellow 180.
  • each layer for example, a layer of yellow pigment, another layer of more yellow pigment, etc.
  • a further aspect provides a greenhouse film comprising one or more pigments, in which the or at least one of the pigments is of a non-weathering grade, such that its colour fades over time.
  • Figure I shows an example of a control vs violet-blue blocking film; the modification occurs from 400- 490 (violet-blue range).
  • the overall PAR light transmission of the film is 81 .4%.
  • the overall 400-440nm light transmission is 25%.
  • the overall 400-490nm light transmission of the film is 45.6%.
  • the overall yellow-red light transmission of the film is 95%.
  • the overall PAR light transmission of the film is 78.4%.
  • the overall 400-440nm light transmission is 22%.
  • the overall 400-490 nm light transmission of the film is 55%.
  • the overall yellow-red light transmission of the film is 95.5%.
  • Figure 2 shows a cross-section of a typical 7-layer violet-blue light modifying greenhouse film with the following layers:
  • a 1 50pm thick 7-layer polyethylene-based greenhouse covering film comprising violet-blue lighter modifier is used to grow strawberry plants.
  • the peak absorption in the violet-blue range of solar spectrum using this yellow colour film is at -430 nm.
  • 1 5-26% increase in marketable yield is achieved.
  • 15% increase in marketable berry number is achieved comparing to control film.
  • 5- 10% berry weight increase is achieved. Further, a significant reduction in un-marketable and waste berry number is achieved comparing to control film.
  • a 200pm thick 5-layer polyethylene-based greenhouse covering film comprising violet-blue lighter modifier is used to grow strawberry plants.
  • the peak absorption in the violet-blue range of solar spectrum using this yellow colour film is at -400 nm.
  • 1 5-26% increase in marketable yield is achieved.
  • 15% increase in marketable berry number is achieved comparing to control film.
  • 5- 10% berry weight increase is achieved. Further, a significant reduction in un-marketable and waste berry number is achieved comparing to control film.
  • a 200pm thick 5-layer polyethylene-based greenhouse covering film comprising violet-blue lighter modifier is used to reduce western flower thrip (WFT) activities.
  • the peak absorption in the violet-blue range of solar spectrum using this yellow colour film is at 430 nm / 400 nm.
  • Said film is bumblebee- friendly. 50% reduction in WFT population is achieved comparing to a control greenhouse film.
  • a 200pm thick 7-layer polyethylene-based greenhouse covering film comprising violet-blue lighter modifier is used to reduce SWD activities.
  • the peak absorption in the violet-blue range of solar spectrum using this yellow colour film is at 430 nm / 400 nm.
  • Said film is bumblebee-friendly. Up to 80% reduction in SWD population is achieved comparing to a control greenhouse film.
  • a I 50pm thick 7-layer polyethylene-based greenhouse covering film comprising violet-blue lighter modifier is used to reduce whitefly and spider mite activities.
  • the peak absorption in the violet-blue range of solar spectrum using this yellow colour film is at 430 nm / 400 nm.
  • Said film is bumblebee- friendly. 60% reduction in whitefly and spider mite population is achieved comparing to a control greenhouse film.
  • Figure 3 details some results relating to test performed using films formed in accordance with the present invention.
  • the present inventions can be embodied in other specific apparatus and/or methods.
  • the described embodiments are to be considered in all respects as illustrative and not restrictive.
  • the scope of the invention is indicated by the appended claims rather than by the description and figures herein. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
  • a greenhouse film that is capable of at least partly blocking the region of the solar spectrum around and/or up to a wavelength in the range 400-490nm.
  • a greenhouse film that is capable of at least partially blocking the solar spectrum up to a wavelength in the range 400-490nm.
  • a polyethylene-based multilayer greenhouse film that is capable of blocking the 400-490nm region of the solar spectrum.
  • a violet light-blocking film which absorbs the violet light in the solar radiation around and/or up to approximately: 400nm, 41 Onm 420nm, 430nm, or 440nm.
  • a blue light-blocking film which absorbs the blue light in the solar radiation around and/or up to approximately: 450nm, 460nm, 470nm, 480nm, or 490nm.
  • a film as listed in any of paragraph I to I I in which the film has multilayer structure.
  • the or at least one of the layers of the film comprises: polyethylene, poly ethylene-vinyl acetate, polypropylene, polyamide, or ethylene vinyl alcohol (EVOH).
  • a polymer film for modifying solar light the film being capable of at least partially blocking the solar spectrum up to and/or within a wavelength and/or wavelength band in the 400-490nm violet-blue range.
  • a Spotted Wing Drosophila (SWD) control film comprising a film as claimed in any preceding claim.
  • a greenhouse comprising, including, having or being fitted with film as listed in any preceding paragraph.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Protection Of Plants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Greenhouses (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un film capable de bloquer au moins partiellement la région du spectre solaire autour et/ou jusqu'à une longueur d'onde dans la plage de 400-490 nm.
PCT/GB2019/050997 2018-04-12 2019-04-05 Film polymère Ceased WO2019197805A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB1806049.1A GB201806049D0 (en) 2018-04-12 2018-04-12 Poymeric film
GB1806049.1 2018-04-12
GBGB1819802.8A GB201819802D0 (en) 2018-12-04 2018-12-04 Polymeric film
GB1819802.8 2018-12-04

Publications (1)

Publication Number Publication Date
WO2019197805A1 true WO2019197805A1 (fr) 2019-10-17

Family

ID=66397257

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2019/050997 Ceased WO2019197805A1 (fr) 2018-04-12 2019-04-05 Film polymère

Country Status (2)

Country Link
GB (1) GB2572865B (fr)
WO (1) WO2019197805A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025062240A1 (fr) * 2023-09-19 2025-03-27 Superior Special Projects Pty Ltd Agencement de film formant barrière à la lumière photo-sélectif

Citations (6)

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Publication number Priority date Publication date Assignee Title
GB2330554A (en) * 1997-10-22 1999-04-28 British Polythene Ltd Plastics film
WO2004077935A1 (fr) * 2003-03-06 2004-09-16 North-West University Couverture de protection de plantes
ES2283215A1 (es) * 2006-04-05 2007-10-16 Repsol Quimica S.A. Filmes polimericos antitermicos para sistemas de cultivo intensivo bajo cubiertas plasticas.
WO2007147758A2 (fr) * 2006-06-22 2007-12-27 Ciba Holding Inc. Processus pour améliorer la croissance de plantes
WO2009115574A1 (fr) * 2008-03-19 2009-09-24 Grow Foil B.V. Serre pour une croissance végétale améliorée
WO2014131027A1 (fr) * 2013-02-25 2014-08-28 The Regents Of The University Of California Cellules solaires organiques transparentes pour applications agronomiques

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