CN103042782B

CN103042782B - Five-layer-coextrusion, high-thermal-insulation, antifogging and drip-free agricultural greenhouse plastic film

Info

Publication number: CN103042782B
Application number: CN201310002230.7A
Authority: CN
Inventors: 米庆华; 谭业明; 韩宾
Original assignee: Shandong Agricultural University
Current assignee: Shandong Agricultural University
Priority date: 2013-01-05
Filing date: 2013-01-05
Publication date: 2014-05-07
Anticipated expiration: 2033-01-05
Also published as: CN103042782A

Abstract

The invention discloses a five-layer-coextrusion, high-thermal-insulation, antifogging and drip-free agricultural greenhouse plastic film which comprises the following raw materials by weight percentage: agricultural polyethylene resin (including EVA (ethylene vinyl acetute) resin), a thermal insulation agent, an antifogging agent, an antidripping agent and an ageing resisting agent. According to the agricultural greenhouse film formed by five-layer coextrusion blow molding according to a layering formula, the thermal insulation property and the usage period of the film can be improved and prolonged; the raw materials are saved; antidripping and antifogging periods are prolonged; the property of the agricultural greenhouse film is improved; the yield and quality of overwintering greenhouse vegetables, fruit trees, flowers, and the like covered with the film can be increased and improved obviously; and the film has better popularization and application prospects.

Description

The high insulation fog dispersal of five-layer co-squeezing is without dripping agricultural booth plastic sheeting

(1) invention field

The present invention relates to the high insulation fog dispersal of a kind of five-layer co-squeezing without dripping agricultural booth plastic sheeting, belong to agricultural booth plastic sheeting production field.

(2) technical background

, although specification (width, thickness) has polytype, in production application, there is following shortcoming in the agricultural booth plastic sheeting of producing and applying at present: the one, and because functional aid price is high, cause agriculture greenhouse film cost high; Film drip phase and fog dispersal phase are short, and the 2nd, insulation and printing opacity particularly thorny, add heat preserving agent printing opacity of many times just poor, and the heat preserving agent price of light transmission good heat preservation performance is high, conventional amount used is large, need reduce costs; The 3rd, drip and fog dispersal are collaborative bad, and the film that drip is good often disperses fog bad, and the drip performance having dispersed fog is poor.Therefore be badly in need of the high insulation fog dispersal of exploitation five-layer co-squeezing without the innovation of dripping agricultural booth plastic sheeting product processes and formula aspect thereof, by five layers of layering refinement formula Design, reach saving raw material, improve film thermal insulating, improve the object of concertedness, service life and the product quality of the fog dispersal of film drip.

(3) summary of the invention

The object of this invention is to provide the high insulation fog dispersal of a kind of five-layer co-squeezing without dripping agricultural booth plastic sheeting, by five layers of layering refinement formula Design, realize saving raw material, improve film thermal insulating performance and used life, improve film drip fog dispersal concertedness, to adapt to better the requirement of plant growth, in the situation that improving heat-insulating property, illumination transmitance, promote crop growth, improve crop yield and quality.

Technical scheme of the present invention is: the production technology of agricultural booth plastic sheeting and formula have been carried out to new Improvement and perfection according to five-layer co-squeezing technique, concrete improvement content is: utilize five-layer co-squeezing equipment and technology, the insulation that plastic sheeting for farm use is needed, fog dispersal, drip, the long-lived functional stratification that waits is realized, according to the demand of height insulation, selected scientific and reasonable dripless agent and antifogging agent proportioning, solve without dripping, contradiction between fog dispersal and service life etc., select suitable resin proportioning, and the rational formula of heat preserving agent and antiaging agent etc., by refinement layering adding technology, reduce costs, improve film thermal insulating, drip fog dispersal concertedness.

Each layer of five layers be by weight percentage: interior one deck 15-30%, interior two layers of 15-30%, intermediate layer 15-25%, outer two layers of 15-20%, outer one deck 15-20%.The material name of each layer and percentage by weight thereof refer to table 1,2,3,4,5 and 6 listed above.

Concrete raw materials composition is: linear low density polyethylene (LLDPE) (LLDPE), metallocene PE (mLLDPE), low density polyethylene (LDPE) (LDPE), ethene one acetate ethylene copolymer (EVA), vinyl acetate (VA), dripless agent KF650, heat preserving agent hydrotalcite, antioxidant B215, light stabilizer 944 and antifogging agent AF38 etc.

The finished product agricultural booth plastic sheeting of producing by scientific and reasonable proportioning and five-layer co-squeezing new technology has that the auxiliary agent of saving, quick heating, good heat insulation, anti-drop defogging are collaborative, longevity and the function such as properties of transparency is good, extremely be conducive to growing of crops, improve the yield and quality of crops.

(4) accompanying drawing explanation

Fig. 1, the high insulation of five-layer co-squeezing anti-drop defogging agricultural booth plastic sheeting processing process figure.

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) specific embodiment

Five-layer co-squeezing high insulation anti-drop defogging each layer of raw material title of agricultural booth plastic sheeting and percentage by weight refer to following table 1,2,3,4,5 and 6 listed content and data.

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

Level	Interior one deck	Interior two layers	Intermediate layer	Outer two layers	Outer one deck
						Percentage by weight (%)	15-30	15-30	15-25	15-20	15-20

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

This layer function is mainly fog dispersal drip, the anti-aging problem solving between the operating period.

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

This layer function is mainly that the drip that solves booth between the operating period extends and problem of aging.

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

The function of this layer is the insulation strengthening layer of greenhouse film.

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

The function of this layer is the problem of aging of anti-film between the operating period.

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

In conjunction with Figure of description and table 1, 2, 3, 4, 5, 6 each layer of percentage by weight that raw material are shared in listed five layers, master batch routinely processing technology is made, by each functional agglomerate of making, material resin fully mixes, according to raw material preparatory technology before plastic sheeting blowing, require to carry out raw material preparation, 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 height insulation anti-drop defogging agricultural booth plastic sheeting that listed formula for raw stock and five-layer co-squeezing blowing unit blow molding process are produced according to the present invention, can improve film thermal insulating performance and light transmittance, better eliminate canopy mist and drip, increase the service life, conservation, and can guarantee product quality and the output of crop, and be agricultural booth film of new generation, especially in northern China agricultural booth plantation area, there is good popularizing application prospect.

Claims

1. the high insulation fog dispersal of five-layer co-squeezing is without dripping agricultural booth plastic sheeting, by polyvinyl resin, heat preserving agent, antifogging agent, drip agent, antioxidant and light stabilizer raw material, formed, it is characterized in that each layer by weight percentage, interior one deck 15-30%, interior two layers of 15-30%, intermediate layer 15-25%, outer two layers of 15-20%, outer one deck 15-20%, five layers of while coextrusion mold; Described interior two layers of each raw material by weight percentage, EVA45-75%, VA content 5-10% wherein, LDPE or LLDPE10-40%; Without dripping anti-aging master batch 15%, wherein drip agent KF65020-30%, light stabilizer 9441-3%, antioxidant B2150.5-2% and heat preserving agent hydrotalcite 5-10%, LLDPE55-70%.

2. the high insulation fog dispersal of a kind of five-layer co-squeezing according to claim 1, without dripping an agricultural booth plastic sheeting, is characterized in that described interior one deck is for fog dispersal is without dripping an anti-aging functional layer, each raw material by weight percentage, EVA25-40%, wherein VA content 4-9%; LDPE20-35%, LLDPE20-35%; Fog dispersal is without dripping anti-aging master batch 10%, wherein drip agent KF65015-30%, antifogging agent AF-382-4%, light stabilizer 9444-6%, antioxidant B2151-4% and heat preserving agent hydrotalcite 5-10%, LLDPE50-73%.

3. according to right, want the high insulation fog dispersal of a kind of five-layer co-squeezing nothing described in 1 to drip an agricultural booth plastic sheeting, it is characterized in that described each raw material of intermediate layer by weight percentage, EVA45-80%, wherein VA content 5-10%; LDPE or LLDPE10-40%; Insulation master batch 10-15%, wherein hydrotalcite 30-50%, LLDPE50-70%.

4. according to right, want the high insulation fog dispersal of a kind of five-layer co-squeezing nothing described in 1 to drip an agricultural booth plastic sheeting, it is characterized in that described outer two layers of each raw material by weight percentage, EVA45-80%, wherein VA content 5-10%; LDPE15-50%; Anti-aging master batch 5%, wherein light stabilizer 9444-8% and antioxidant B2152-4%, LLDPE88-94%.

5. the high insulation fog dispersal of a kind of five-layer co-squeezing according to claim 1, without dripping agricultural booth plastic sheeting, is characterized in that described each raw material of outer one deck by weight percentage, mLLDPE45-80%, LDPE15-50%; Anti-aging master batch 5%, wherein light stabilizer 9446-10% and B2154-8%, LLDPE82-90%.