CN103688798A

CN103688798A - Dimming heat insulation greenhouse film and manufacturing method thereof

Info

Publication number: CN103688798A
Application number: CN201310702282.5A
Authority: CN
Inventors: 王猛
Original assignee: SUZHOU USTC WEILONG INFORMATION TECHNOLOGY Co Ltd
Current assignee: SUZHOU USTC WEILONG INFORMATION TECHNOLOGY Co Ltd
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2014-04-02

Abstract

The invention relates to a dimming heat insulation greenhouse film and a manufacturing method thereof. The greenhouse film comprises a base layer film (1), a dimming film (2) and a TiO2 heat insulation film (3). The base layer film (1) is an outer layer, the dimming film (2) is a middle layer, and the TiO2 heat insulation film is an inner layer. The base layer film (1) is made of ethylene-vinyl acetate copolymer, and the dimming film (2) is made of hydroxypropyl methyl cellulose. The TiO2 heat insulation film (3) is made of nanometer titanium micro balls of a casing core structure. By means of the film and the method, greenhouse inside temperature increasing and keeping effects are good, biochemical effects of crops are high, functions of early maturing, high yield and nutrient content improvement are achieved on different crops, TiO2 can absorb ultraviolet and block far infrared, the service life of the agricultural film is prolonged, negative oxygen ions are created, and an agricultural greenhouse simulating the forest environment is provided.

Description

A kind of light modulation insulation horticultural covering film and preparation method thereof

Technical field

The present invention relates to a kind of light modulation insulation horticultural covering film and preparation method thereof, belong to the light quality control technology field of intelligent industrialized agriculture.

Background technology

The conventional horticultural covering film of China mainly contains four kinds: the first is polyvinyl chloride (PVC) canopy film; The second is polyethylene (PE) canopy film; The third is ethylene-vinyl acetate copolymer canopy film; The 4th kind is light modulation plastic sheeting for farm use.These several canopy films are having points of resemblance in nature, also have difference, thereby result of use are also variant;

(1) polyvinyl chloride (PVC) canopy film heat insulating ability, light transmission, good weatherability, softness, easily moulding, is applicable to the outer cladding material as greenhouse, booth and medium and small shed.Shortcoming be film than great (1.3 grams/cc), the canopy film area coverage of constant weight reduces 1/3 compared with polyethylene film (PE), cost increases; Hardening under low temperature, embrittlement, easily softening, lax under high temperature; After auxiliary agent is separated out, face dust suction, affects printing opacity, and the processing of can not burning of residual film, because there being chlorine to produce;

(2) PE (claims again two anti-films without dripping anti-aging film, long-lived anti-dropping film) there is anti-drop property, weather resistance, light transmission and good heat preservation performance simultaneously, anti-droplet effect can keep 2-4 month, the ageing-resistant life-span can reach 12-18 month, that performance is more complete, use plastic sheeting for farm use kind widely, not only can be used for greenhouse and big or middle hut, and also comparatively applicable to the stubble cultivation of energy-saving heliogreenhouse spring;

(3) ethylene-vinyl acetate copolymer (being called for short EVA) canopy film: (adding a certain proportion of eva), EVA resin is in recent years for the new plastic sheeting for farm use material in agricultural, with the plastic sheeting for farm use of its manufacture, light transmission, heat insulating ability and weather resistance are all better than PVC or PE plastic sheeting for farm use.EVA plastic sheeting for farm use covers and can increase production 10% left and right compared with other canopy films, can use continuously more than 2 years, aging front indeformable, with after can conveniently reclaim, be difficult for causing soil or environmental pollution;

(4) light modulation plastic sheeting for farm use adds the light modulation film that rare earth and other functional aids are made in PE resin, and can carry out selectivity to light and see through, be the novel cladding material that can make full use of solar energy; But rare earth element more and more lacks, first material is obtained difficult.

For above-mentioned problem, need to provide a kind of absorbs ultraviolet ray and intercepts the far infrared that plant growth is produced to inhibition, the ruddiness that transmissive plant growth is required, the product of blue light and possess the plastic sheeting for farm use of insulation, can also manufacture negative oxygen ion, promote air quality in canopy, allow booth internal environment just like in forest, promote plant-growth factor, not only can solve booth and affect the problem of plant growth because of light quality factor, also can when summer, reduce temperature of shed, during winter, keep temperature of shed.

Summary of the invention

The object of the invention is to overcome the heat insulation of existing plastic sheeting for farm use, insulation, light quality is controlled the problem of improving with air quality, provide and utilize the conversion of TiO2 light energy that ultraviolet ray and far infrared for affecting plant growth are isolated out, and intercept main 2 wave bands that sunshine produces heat energy, wave number 3330, rejection rate be 53% with wave number 1643 rejection rates be 65%, reach effect of heat insulation, TiO2 produces the function of hydroxyl free radical, coordinate the air humidity in booth to convert negative oxygen ion to, build booth air ambient as the environment of forest; By the toning blue film of film and its all band of red membrane filtration sunshine, the light quality of plant growth is provided, promote the photosynthesis of plant, the invention provides to agricultural greenhouse, family's glass sunlight house is used.

The present invention includes (1) base film layer, (2) toning film, (3) TiO2 thermal isolation film forms.

Above-mentioned light modulation insulation horticultural covering film, the material of wherein said (1) base film layer is EVA material, wherein said (2) toning film main material is hydroxypropyl methylcellulose, and wherein said (3) TiO2 thermal isolation film material is the nano-titanium microsphere gel of the core-shell structure of sharp titanium druse

Accompanying drawing explanation:

Fig. 1: be light modulation insulation horticultural covering film structural representation of the present invention

In figure

(1) base film layer (2) toning film

(3) TiO2 thermal isolation film

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

Refer to Fig. 1, light modulation insulation horticultural covering film, include (1) base film layer, (2) toning film, (3) TiO2 thermal isolation film, wherein said (1) base film layer is EVA material, the material of (2) toning film is on hydroxypropyl methylcellulose coating and base film layer, (3) material of TiO2 thermal isolation film TiO2 thermal isolation film is the nano-titanium microsphere gel of the core-shell structure of sharp titanium druse, is coated on toning rete.

The main feature of light modulation insulation horticultural covering film of the present invention is as follows:

1, the nano-titanium microballoon of core-shell structure, each microballoon is between 100-200nm, through finishing, can accomplish hydrophilic and lipophile, shell is the shell that nano titanium oxide forms, forming each ball has 80% area to have the existence of sodium rice titanium dioxide, and the following area of 100nm that reaches real nanometer effectiveness is greater than 80%.

2, there is good photocatalysis effect, can decompose airborne pernicious gas and part inorganic compound.

3, produce anion oxygen, reach air purification effect, create booth air quality environment, be modeled to forest environment.

4, there is uvioresistant, self-cleaning, aging-resistant effect.

5, the transparency of shielding infrared capable excellence, rejection rate: wave number 3330, rejection rate is 53%, wave number 1643, the heat energy of rejection rate 65%, reaches the effect that insulation heats.

6, provide the required blue light of plant growth and ruddiness light quality, promote photosynthesis of plant.

In sum, the light modulation insulation horticultural covering film that the invention of this reality provides, simulates natural ecological circulation system, provide crop just like growing at forest environment, in canopy, temperature raising and maintaining is effective, and crop biochemical effect is strong, Different Crop is there is to the functions such as precocity, high yield, raising nutrient component, TiO2 can also absorb ultraviolet ray, extends the service life of plastic sheeting for farm use, reduces high light, improve temperature, vegetative period, good quality and high output, was applicable to the cultivation of agricultural greenhouse crop ahead of time.

Although the present invention discloses as above with preferred embodiment; so it is not invented in order to limit, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.

Claims

1. light modulation insulation horticultural covering film and preparation method thereof, is characterized in that: described light modulation insulation horticultural covering film is by EVA film, hydroxypropyl methylcellulose, and the nano-titanium microballoon of core-shell structure forms, and their Thickness Ratio is that percentage ranges is 1:0.5:0.5.

2. a preparation method for light modulation insulation horticultural covering film, comprising: (1) is placed in base film layer on the cylinder of film applicator, by roller motor, is carried; (2) membrane material (hydroxypropyl methylcellulose of mixing colours, colouring agent, sodium chloride, according to ratio, put into equal pulp grinder homogenate), even mixed product, puts into one-level film applicator slurry tank, with roller, evenly coats on EVA film, the baking temperature of film applicator is arranged on 140-145 degree Celsius, forms the toning film of the second layer; (3) by TiO2 thermal isolation film material (the nano-titanium microsphere gel of core-shell structure), put into secondary film applicator slurry tank, with roller, evenly coat on the film after step (2), the baking temperature of film applicator is arranged on 110-125 degree Celsius, forms the 3rd layer of TiO2 thermal isolation film.

3. a kind of light modulation insulation horticultural covering film and preparation method thereof as claimed in claim 2, is characterized in that: described base film layer is EVA material.

4. the preparation method of a kind of light modulation insulation horticultural covering film as claimed in claim 2, is characterized in that: described toning film main material is hydroxypropyl methylcellulose.

5. the preparation method of a kind of light modulation insulation horticultural covering film as claimed in claim 2, is characterized in that: the material of described TiO2 thermal isolation film is the nano-titanium microsphere gel of the core-shell structure of sharp titanium druse.