CN103125308A

CN103125308A - Agricultural greenhouse film for strengthening light conversion effects

Info

Publication number: CN103125308A
Application number: CN2013100890244A
Authority: CN
Inventors: 米庆华; 谭业明; 韩宾
Original assignee: Shandong Agricultural University
Current assignee: Shandong Agricultural University
Priority date: 2013-03-19
Filing date: 2013-03-19
Publication date: 2013-06-05

Abstract

An agricultural greenhouse film for strengthening light conversion effects is composed of raw materials such as agricultural polyethylene resin (containing ethylene vinyl-acetate (EVA) and metallocene polyethylene resin), light conversion agent, heat preservation agent, antifogging agent, flowing and dropping agent and anti-aging agent. The agricultural greenhouse film is formed by conducting five-layer coextrusion blow molding by using the raw materials, by weight, according to a layering formula, a light conversion effect strengthening layer is particularly designed to be capable of obviously strengthening light conversion persistent effect performance and using periods of the film, the raw materials are saved, simultaneously a light conversion flowing and dropping antifogging period can be prolonged, and light conversion and multifunctional performance of the agricultural greenhouse film are improved. The agricultural greenhouse film is used in overwintering greenhouses for cultivating plants such as vegetables and fruit trees in the northern area in China, and promotion of the light conversion effects can obviously improve yield, quality and economic benefits, so that the agricultural greenhouse film has good popularization and application prospect.

Description

A kind of enhancing turns the agricultural booth film of light transmittance efficiency

(1) invention field

The invention belongs to farm plastic greenhouse film product production field.

(2) technical background

China's Development and Production turns the light multifunctional agricultural canopy film history of existing more than 10 year, that the conversion film description has is multiple (thickness, fabric width, without drip, fog dispersal function etc.), but all there are some defectives: especially turn the light term of validity and anti-drop defogging phase short, now be badly in need of to utilize new production technology, develop new product, extend the film functional period by five-layer co-squeezing technique, to reach the saving raw material, improve the purpose of product cost performance, prolongation drip fog dispersal phase and product quality.

(3) summary of the invention

The vegetable and fruit booth production of the northern area of China particularly needs to turn the strong plastic greenhouse film of light transmittance efficiency, to enhance productivity.the objective of the invention is to turn for original that in light multifunctional agricultural canopy film product, light conversion agent and dripless agent are added in layer, easily with the release of the dripless agent inefficacy of running off, utilize a kind of five-layer co-squeezing agricultural canopy film production equipment and technique, the light conversion agent of costliness is added separately turn the light functional layer in five-layer co-squeezing, can save raw material, improve the film guarantor and turn optical property and service life, extend the drip fog dispersal phase, satisfy better northern China greenhouse crop growth in winter light quality environmental condition, turn light in raising, drip, in the situation of fog dispersal performance, improve crop yield, quality and economic benefit.

Technical solution of the present invention is: agricultural production technology and the formula that turns the optical plastic film carried out Improvement and perfection, the content of Improvement and perfection is: excavate five-layer co-squeezing equipment advantage, the functional stratifications such as light, fog dispersal, drip that turn that easily run off with dripless agent are realized, by the proportioning of carrying out of the laminated natural sciences of five-layer co-squeezing equipment advantage, solve light conversion agent in the past, dripless agent, antifogging agent easily runs off and service life is short problem.

Concrete summary of the invention is: five each layers of tunic by weight percentage: interior one deck 12-25%, interior two layers of 12-25%, intermediate layer 20-30%, outer two layers of 12-25%, outer one deck 12-20%.It is 1,2,3,4,5 and 6 listed that the raw material title of above-mentioned each tunic and percentage by weight thereof see Table.

The detailed composition of raw materials is: metallocene PE (mLLDPE), low density polyethylene (LDPE) (LDPE), linear low density polyethylene (LLDPE) (LLDPE), ethene one acetate ethylene copolymer (EVA), dripless agent KF650 and LA-2, antioxidant B215, light stabilizer 944 and 622, antifogging agent TF-31 etc.

Produce by reasonable scientific matching and five-layer co-squeezing new technology the agricultural booth film that qualified increase turns light transmittance efficiency, have and save auxiliary agent, strengthen and turn light transmittance efficiency and extend the duration and the function such as anti-drop defogging phase, quick heating and properties of transparency be good, extremely be conducive to growing of facility cultivation crops, especially can obviously improve output, quality and the economic benefit of crops at China's northern area in winter.

(4) description of drawings

Fig. 1, enhancing turn the five-layer co-squeezing agricultural booth processing film process chart of light transmittance efficiency.

In figure, 1 is interior one deck, the 2nd, and interior two layers, the 3rd, intermediate layer, the 4th, outer two layers, the 5th, outer one deck, the 6th, coextrusion blow, the 7th, packing warehouse-in.

(5) embodiment

Strengthen the title of each layer of the five-layer co-squeezing agricultural booth film raw material turn light transmittance efficiency and percentage by weight and see following table 1,2,3,4,5 and 6 listed content and data for details.

The percentage by weight of the shared total film of each layer of table 1 raw material

Level	Interior one deck	Interior two layers	The intermediate layer	Outer two layers	Outer one deck
						Percentage by weight (%)	12-25	12-25	20-30	12-25	12-20

Each raw material of the interior one deck of table 2 and percentage by weight thereof

This functional layer is mainly to solve fog dispersal between the operating period without dripping and collaborative anti-aging problem.

Interior two layers of each raw material of table 3 and percentage by weight thereof

This functional layer is mainly to extend and the anti-aging problem nothing phase of dripping that solves booth between the operating period.

Each raw material of table 4 intermediate layer and percentage by weight

This functional layer is that the nothing of greenhouse film is dripped function intensified layer.

Outer two layers of each raw material of table 5 and percentage by weight thereof

This layer major function is to strengthen to turn light transmittance efficiency.

Each raw material of the outer one deck of table 6 and percentage by weight thereof

The function of this layer is the losing issue of the aging and obstruct light conversion agent of anti-film between the operating period.

accompanying drawing and table 1 to specifications, 2, 3, 4, 5, the 6 shared percentage by weights of each layer raw material in listed five layers, master batch processing technology is routinely made, with each functional agglomerate of making, the abundant mixing of material resin, require to carry out raw material preparation according to raw material preparatory technology before plastic film blowing, by original single extruding machine, change five extrusion heads into, use import or domestic wide cut (more than 9 meters) five-layer co-squeezing blowing unit to get final product one-shot forming, reach the effect target of five-layer co-squeezing, listed raw material in the present invention, be all the qualified products of the regular manufacturer production of market sale.

the five-layer co-squeezing of listed formula for raw stock and the production of five-layer co-squeezing blowing unit blow molding process strengthens the agricultural booth film that turns light transmittance efficiency according to the present invention, transmitance and the invalid light that can improve the film efficient light are converted to the efficient light rate, have simultaneously and extend preferably fog dispersal and drip function, increase the service life, conservation (can reduce extremely expensive light conversion agent consumption 70%), and can improve because of the humidification that turns light transmittance efficiency output and the quality of crop, it is the long-acting light agricultural booth film that turns of a new generation, in northern China greenhouse gardening in winter area and national facility cultivation district have good popularizing application prospect.

Claims

1. an enhancing turns the agricultural booth film of light transmittance efficiency, formed by metallocene PE resin, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), heat preserving agent, light conversion agent, antifogging agent, drip agent, antioxidant and light stabilizer raw material, use five-layer co-squeezing equipment coextrusion mold simultaneously; It is characterized in that strengthening turn light transmittance efficiency outer two layers of each raw material by weight percentage, EVA40-83%, wherein VA content 4-12%; LDPE13-47%; Turn light anti-aging master batch 3-10%: wherein light conversion agent 0.6-2%, light stabilizer 9442-4%, 6222-4%, antioxidant B2153-5%, LLDPE85-96%.