# US 11,895,952 B2 · Agricultural and horticultural covering film and method for producing the same

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- Number: US 11,895,952 B2
- Document ID: US11895952B2
- Status: Granted
- Kind: B2
- Application number: 16/623,970
- Filed: 2018-06-19
- Published: 2020-08-27
- Granted: 2024-02-13
- Earliest claimed: 2017-06-19
- Assignees: Sumitomo Metal Mining Co., Ltd.
- Applicants: Sumitomo Metal Mining Co., Ltd.
- Inventors: Hirofumi Tsunematsu; Takeshi Chonan
- Web page: https://patentgrep.com/patent/US11895952B2

## CPC

- A01G 13/33: Sheets or films
- A01G 9/1438: {Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches}
- C01G 41/00: Compounds of tungsten
- C01G 41/006: {Compounds containing tungsten, with or without oxygen or hydrogen, and containing two or more other elements}
- C01G 41/02: Oxides; Hydroxides
- C08J 3/226: {using a polymer as a carrier}
- C08J 5/18: Manufacture of films or sheets
- C08J 7/0427: {with only one layer of a composition containing a polymer binder (with more layers C08J7/042)}
- C09C 3/063: {Coating}
- C01P 2002/30: Three-dimensional structures
- C01P 2002/60: Compounds characterised by their crystallite size
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/74: by peak-intensities or a ratio thereof only
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/12: Surface area
- C01P 2006/80: Compositional purity
- C01P 2006/90: Other properties not specified above
- C08J 2323/06: Polyethene
- C08J 2423/06: Polyethene
- Y02A 40/25: Greenhouse technology, e.g. cooling systems therefor
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

An agricultural and horticultural film that does not raise a temperature of an atmosphere such as a greenhouse by using the agricultural and horticultural film in the greenhouse, etc., while absorbing infrared rays from the sunlight and warming the soil, the film having an infrared absorbing layer containing infrared absorbing material ultrafine particles, wherein the infrared absorbing material ultrafine particles are composite tungsten oxide ultrafine particles, and the composite tungsten oxide ultrafine particles have a XRD peak top intensity ratio value of 0.13 or more based on an XRD peak intensity ratio value of 1 on plane of a silicon powder standard sample (640c produced by NIST).

## Claims

### Claim 1

An agricultural and horticultural film having an infrared absorbing layer containing infrared absorbing material ultrafine particles,
wherein the infrared absorbing material ultrafine particles are composite tungsten oxide ultrafine particles,
the composite tungsten oxide ultrafine particles have a XRD peak top intensity ratio value of 0.13 or more based on an XRD peak intensity ratio value of 1 on plane (220) of a silicon powder standard sample (640c produced by NIST),
a dispersed particle size of the composite tungsten oxide ultrafine particles is 10 nm or more and 200 nm or less,
a crystallite size of the composite tungsten oxide ultrafine particles is 10 nm or more and 200 nm or less, and
each of the composite tungsten oxide ultrafine particles is made of a single crystal in which a volume ratio of an amorphous phase in the composite tungsten oxide ultrafine particles is less than 50%.

### Claim 2 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein the infrared absorbing layer in which the infrared absorbing material ultrafine particles are dispersed in a resin binder is provided on at least one surface of an agricultural and horticultural covering film.

### Claim 3 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein the infrared absorbing material ultrafine particles are present in a dispersed state inside an agricultural and horticultural covering film.

### Claim 4 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein the composite tungsten oxide ultrafine particles are represented by a general formula MxWyOz (wherein M element is an element of one or more kinds selected from the group consisting of H, He, alkali metal, alkaline earth metal, rare earth elements, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, and I, W is tungsten, O is oxygen, satisfying 0.001≤x/y≤1, 2.2≤z/y≤3.0).

### Claim 5 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein the composite tungsten oxide ultrafine particles include a hexagonal crystal structure.

### Claim 6 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein a content of a volatile component in the composite tungsten oxide ultrafine particles is 2.5 mass % or less.

### Claim 7 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein a surface of the composite tungsten oxide ultrafine particles is coated with an oxide containing one or more elements selected from the group consisting of Si, Ti, Zr, and Al.

### Claim 8 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein the film is at least one selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, tetrachlorotrifluoroethylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polystyrene, ethylene vinyl acetate, and polyester resin.

### Claim 9 (depends on 1)

The agricultural and horticultural film according to claim 1, wherein a white light reflecting layer in which a white reflecting material is dispersed is provided inside an agricultural and horticultural covering film.

### Claim 10 (depends on 9)

The agricultural and horticultural film according to claim 9, wherein the white light reflecting material is at least one selected from the group consisting of TiO2, ZrO2, SiO2, Al2O3, MgO, ZnO, CaCO3, BaSO4, ZnS, and PbCO3.

### Claim 11 (depends on 1)

The agricultural and horticultural film according to claim 1:
having a white light reflecting layer formed by coating a first surface with a white light reflecting material, and an infrared light absorbing layer formed by further coating the white light reflecting layer with infrared absorbing material ultrafine particles, or
having a white light reflecting layer formed by coating a first surface with a white light reflecting material, and an infrared absorbing layer formed by coating a second surface with infrared absorbing material ultrafine particles.