To provide a laminate having characteristics of a fluorinated polymer film such as weather resistance and stain resistance, and having an increased solar reflectance by a light reflection layer, wherein the solar reflectance is less likely to decrease over a long period of time, and the light reflection layer is less likely to delaminate; and a production process thereof.

A laminate 1 comprising a substrate 10 containing a first fluorinated polymer, a light reflection layer 12 made of a non-curable resin composition containing a second fluorinated polymer and an aluminum pigment, and a protective layer 14 obtained by curing a curable resin composition containing a third fluorinated polymer having a crosslinkable group and a curing agent for curing the third fluorinated polymer, wherein the light reflection layer 12 is disposed between the substrate 10 and the protective layer 14, the light reflection layer 12 has a thickness of from 0.5 to 5 μm, and the protective layer 14 has a thickness of from 0.3 to 2 μm.

A polytunnel structure is described having a plurality of cover support members supported upon respective pairs of legs, a cover member supported by the cover support members, an edge of the cover member being secured to a rotatable beam, and an anchor rope, strap or the like extending over the cover member to anchor the cover member in position, wherein the cover support members are each shaped to define a step between a first section and a second section, wherein when the rotatable beam is supported upon the second section, the anchor rope, strap or the like provides a reduced resistance to movement thereof.

A structure for growing plants comprising a main support, vertical supports along the perimeter of the foundation, a perimeter frame connected to the vertical supports, cables connected to the main support, vertical supports and perimeter frame, and an inner and outer shell formed from transmissive panels supported by the cables.

An agricultural fluorine-resin film and a greenhouse that can increase yield of crops even in high-eave houses are provided. In the agricultural fluorine-resin film containing fluorine-resin, one surface has an uneven surface 1a, a transmittance at a wavelength of from 300 to 800 nm is from 20% to 70%, and a transmittance T.sub.2 below is 75% or more. Transmittance T.sub.2: Transmittance of a laminate at a wavelength of from 300 to 800 nm, obtained by laminating the resin film and a test film, in which the uneven surface 1a of the resin film is completely filled with water, and the test film which has a thickness of 50 μm, is formed of only an ethylene-tetrafluoroethylene copolymer, and has a transmittance at a wavelength of from 300 to 800 nm of 94% and an arithmetic average roughness Ra of both surfaces of 0.04 μm is laminated on the resin film.

Greenhouse comprised of a ridge beam extending some distance above its roof defining two elongated side zones at either side of the ridge beam. The ridge beam is comprised of one or more elongated hollow spaces and with one or more closable openings in both side zones. The openings fluidly connect the exterior of the greenhouse with its interior and may be closed at one side and opened at its other side depending on the direction of the wind.

A greenhouse has a daylighting member supported by a frame. The daylighting member partitions a growing space for agricultural products from an outside world, and emits light, which has entered from a light incident surface on one side, from a light emitting surface on the other side. The daylighting member has a transparent substrate layer and a transparent light emitting layer provided closer to a light emitting surface side than the substrate layer. The light emitting layer has a refractive index of 1.54 or less, water absorbability, and an equilibrium moisture content of 10% or greater at 25° C. and a relative humidity of 80%.

Self-supporting inflatable grow tents include a base surface, a top surface, and a plurality of sidewalls. The sidewalls include an integrated lighting system. The inflatable grow tents include a plurality of support members configured to structurally support the grow tent when inflated, and an air circulation assembly including an air blower and a carbon filter. The grow tents include a lighting system configured to provide a standard deviation of average photosynthetic active radiation that is from about 2 to about 8 within the grow tent when the lighting system is active.

A process for conditioning the air within a greenhouse comprising transparent walls and a structure including one or more ridge beams as part of a roof of the greenhouse. The process comprises maintaining a pressure difference between an average pressure within the greenhouse and a pressure exterior to the greenhouse, taking in air from the exterior of the greenhouse and mixing this air with air taken from the interior of the greenhouse to obtain conditioned air, distributing the conditioned air via a forced flow to the interior of the greenhouse, and discharging a volume of air from the interior of the greenhouse via openings present in the one or more ridge beams such to maintain the pressure difference.

Embodiments relate to a method for manufacturing a heat-shielding film in which a heat-shielding material has been well dispersed in a polyvinyl chloride resin. According to one embodiment, the method for manufacturing the heat-shielding film includes (1) mixing a polyvinyl chloride resin composition (P) containing the polyvinyl chloride resin (A) using a blender, and (2) adding and further mixing the heat-shielding material with the mixture obtained in step (1 The heat-shielding material contains at least antimony-doped tin oxide micro-particles (B) in an amount in which the mass ratio of the polyvinyl chloride resin (A) to antimony-doped oxidized tin micro-particles (B) is 100 parts by mass to 1.5 to 15 parts by mass. The heat-shielding material is composed of antimony-doped oxidized tin micro-particles (B) alone.

A device for encasing a plot of land is disclosed. The device includes a modular base placed around the perimeter of the plot of land. The base has a slot in the top for receiving a number of panels that form the sides and top of the enclosure. A bottom screen may extend across the bottom of the base. The panels may have an opening which is covered by an insert panel. The insert panel may be a screen or a material having greenhouse properties.