CN105885093A

CN105885093A - Heat insulation and increasing master batch for plastic greenhouse film

Info

Publication number: CN105885093A
Application number: CN201410586632.0A
Authority: CN
Inventors: 刘永峰; 王恩信
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-20
Filing date: 2014-10-20
Publication date: 2016-08-24

Abstract

The invention provides a production method of a heat insulation and increasing master batch for a plastic greenhouse film. The production method includes the following steps: preparing the following components: 70% of kaolin in 1250 meshes, 3% of stearic acid, 14% of polyethylene wax, 10% of LDPE 1F7B (melt index is 7), and 3% of an ethylene-acrylic copolymer; performing high-speed mixing to the kaolin and the stearic acid in a high-speed mixer for 15 min; and performing high-speed mixing to all materials in the high-speed mixer until the polyethylene wax is molten through heat release in the process and coats the powders to prepare a pre-modified material; and performing granulation to the pre-modified material in a twin-screw granulation machine set in manner of hot-cut granulation or bar-drawing water-cooling granulation.

Description

The insulation of hot house film heats masterbatch

Background of invention: now, produce veterinary antibiotics, flowers etc. in China with hot house and develop rapidly, Chaoyang area has become China's booth vegetable base, and Liaoning Province's booth produces and also develops quickly, and each province is all being sent out Exhibition booth produces, increasing peasant income, also enriches society's vegetable substance.Management hot house produces primary asking Topic is Winter protection, makes temperature of shed be far above outside canopy, makes crops be germinateed, grows up, ripe, both Making season cold in the winter time, in canopy, crop grows the most in the same old way.In order to keep canopy temperature, people think A lot of ways, as lid straw screen or mat, wall of lighting a fire, thicken after wall or thicken awning film, but pros and cons mix half, produce effects and have Limit.Enable awning film itself to stop temperature to outflow (i.e. intercepting infrared ray), particularly keep night in booth Temperature, effect can more preferably, and in universal experience can make booth, nocturnal temperature improves 4～5 DEG C.

There is iris action to have Kaolin, mica powder, Pulvis Talci in ultrafine inorganic powder to infrared ray.According to money Material is introduced, and they inserts polyethylene respectively, blows out thin film respectively, and they are infrared to 7～14 μ m Line transmitance drops to 35%～38%.Insert poly-after clay superfine for kaolinite (particle diameter 2 μm) special handling Ethylene, blows out thick 0.12mm thin film and the infrared light transmission of 7～14 μ m can be made to drop to less than 25%. Because the emittance 98% of sunlight arrival on daytime earth surface concentrates on the wave-length coverage of 0.3～3.0 μm In, point ultraviolet light (wavelength 0.3～0.4 μm) visible ray (wavelength 0.4～0.8 μm) infrared light (wavelength 0.8 μm Above) concentrate in the wave-length coverage of 7～25 μm from earth surface to the emittance of atmospheric scattering 90% night, Its peak value 11～12 mum wavelength.Infrared light-wave in this wave-length coverage is intercepted very poor by Plain PE film, Infrared light transmittance reaches 70%～80%, although and its performance of ageing-resistant Anti-fogging Film is better than Plain PE film, But the speed that in night canopy, heat scatters and disappears is also faster than Plain PE film, and reason is Plain PE film Condensing a large amount of water droplet at canopy inner face, outwards scattering and disappearing heat in canopy serves certain iris action.

Ultrafine kaolin masterbatch is the best production, is added in plastics its platy particle dispersion also difficult, they Shape of particle is the most still lamellar as Pulvis Talci particle, its specific surface area (m²/ g) (ratio bigger than Pulvis Talci Surface area 8～65, Pulvis Talci 2.6～35) surface can be high, oil absorption big (oil absorption 45～120, Talcum Powder 22～57), oil absorption is that talcous twice is many, if inserting plastics, powder particle first to moisten Can be by plastic overmold, owing to oil absorption is big, moistening difficulty, it is difficult to be wrapped by, therefore, inserts plastics or make Masterbatch technique is all very difficult.Therefore, the most at home and abroad this ultrafine kaolin is had not yet seen on market Masterbatch.

Brief summary of the invention: the present invention divides three parts, and one is the treatment technology of kaolin powder, and two is to give modified materials Manufacturing technology, three. Kaolin masterbatch manufactures.The prominent performance of mica powder is that excellent electrical property, valency are expensive, Selecting Kaolin, Pulvis Talci, super fine talc powder master batch is fruitful, and super fine talc powder master batch is than super Thin Kaolin masterbatch is easy to do, the thing that difficulty is done must have the chief, therefore select ultrafine kaolin.

1 kaolin powder treatment technology:

Kaolinic constitutional chemistry tries: Al₂O₃·2SiO₂·2H₂O

SiO₂38.5% Al₂O₃23～44.5%

Density 2.58～2.63g/Cm³Hardness 2.4～8

Refraction index 1.56～1.62

Kaolin is combined into by the salic stratification of silicon dioxide layer and water, has hexagon laminated structure, Kaolin surface after pulverizing, processing, with hydroxyl and oxy radical, has acidity (pH value 5～8), Higher by calcined kaolin acidity, specific surface area is big, surface can be high, and surface activity is big, has stronger conglomeration Tendency, mostly the ultrafine kaolin that market is sold is the particle reunited, and the particle of reunion is not the most micropowder, Therefore it is switched on those particles reunited, and makes it no longer reunite.

Manufacturing powder body with Ore is to pulverize with machinery mill combination, and higher level is to pulverize by airflow milling, and Ore is by powder Broken destroy chemical bond (covalent bond, ionic bond, the metallic bond being combined into Ore；Noncrystal longrange disorder, Shortrange order, crystal long-range order) become powder body.The knot of powder body is poly-is that the surface by powder particle can be in conjunction with , these can be opened with the kinetic energy of super mixer leaf wing much smaller than chemistry bond energy in the surface of material therefore The particle reunited；After shutting down, the particle opening reunion also to be reunited, and this will be when not shutting down by grain Attached bag is covered, and the time of cladding is just right, can not be coated with before particle aggregation is not switched on, and particle aggregation is beaten To be coated with immediately after opening, this point to be reached, can be selected for the solid of low melting point and Kaolin particle surface Hydroxyl and oxy radical have the material that effect is good with the matrix resin compatibility, such as stearic acid (fusing point 69.6 DEG C), When the particle of the powder reuniting in super mixer is opened, the stearic acid being mixed into together with powder body is by powder Body mill sassafras heat melts just, coated powder particle immediately.Complete the treatment technology of kaolin powder.

Two, pre-modified materials manufacturing technology.

Ultrafine kaolin masterbatch is the best production, is added in plastics its platy particle dispersion also difficult, they Shape of particle be the most still lamellar as Pulvis Talci particle, its specific surface area (m²/ g) (ratio bigger than Pulvis Talci Surface area 8～65, Pulvis Talci 2.6～35) surface can be high, oil absorption big (oil absorption 45～120, Talcum Powder 22～57), oil absorption is that talcous twice is many, first to moisten then could be moulded if inserting plastic pellet Material cladding, owing to oil absorption is big, moistening difficulty, it is difficult to be wrapped by.That is this process can not be carried out.

The second law of thermodynamics of change in process condition between reaction universe:

PV=Δ U-Δ F-T Δ S

PV represents process

T Δ S absolute temperature T and the product of Entropy Changes Δ S, entropy is system Dispatcher, Δ S ＞ 0 system absorb heat, Δ S ＜ 0 is System heat release.

The change of energy in Δ U table, U is the cashier of system, and Δ U is Timing, table+Δ U is draw heat, when Δ U is negative, Table-Δ U is exothermic

The change of Δ F table process free energy.Δ F=Δ U-PV-T Δ S.

When Δ F ＜ 0 is negative, process is carried out automatically；When Δ F=0 is zero, process reaches to balance and does not carry out；Δ F ＞ 0 During more than zero, process is carried out round about.We want process and automatically carry out it is necessary to it is negative for making Δ F. Premix material is manufactured by second law of thermodynamics formula-Δ F=-Δ U+PV+T Δ S.Wherein-Δ U is negative, process It it is heat release.Δ S ＜ 0 system heat release.

We reconcile this process and carry out in super mixer, and it is negative for allowing process heat release, i.e.-Δ U.

Formula: Kaolin (1250 mesh) 70%, stearic acid 3%, Tissuemat E 14%,

LDPE 1F7B (melt index (MI) 7) 10%, ethylene-acrylic acid copolymer 3%.

First Kaolin and stearic acid are put into super mixer, mixed at high speed 15 minutes, completes the powder body of the first step Process.Then all material is put into full super mixer, carries out mixed at high speed, until process heat release will be poly- Ethylene waxes is melted to be coated with powder body.Complete the manufacture giving modified materials.Modified material pelleting is given extremely easily with this, Both made in single screw pelletizer group, also can the most successfully pelletize.

Three. Kaolin masterbatch manufactures.As long as by the most pre-modified materials, meet second law of thermodynamics formula:

PV=Δ U-Δ F-T Δ S Δ S ＞ 0

System is absorbed heat, as long as heating, process can be carried out.

Machinery heating, with dual-screw pelletizer group pelletize.Earnestly pelletize, tie rod water-cooled pelletize.Pelletize is Do the routine techniques that the people of plastics everybody knows, repeat no more.

The effect of Main Ingredients and Appearance in formula:

Kaolin: due to kaolinic hexagon lamellar crystal structure, make it have excellent physicochemical property, Kaolin is not the most widely used as a kind of outstanding inorganic particle, is because its more Superfine powder adds difficult toward plastics reason and causes interpolation masterbatch the most difficult.Ultrafine kaolin powder is that one is well moulded Material filler, all mechanical properties that it inserts measured by the composite of plastics are higher than calcium carbonate composite material Much, higher than talcum powder compound material.Particularly it add reduced TG temperature plastics (as polyethylene, Polypropylene), the hot strength and the modulus that improve composite are effective especially, the most do not significantly reduce elongation percentage simultaneously And impact strength.It inserts in cable cover(ing) goods, be possible not only to improve the modulus of sizing material and hot strength, Improve wearability and anti-cut mouth extensibility, and the electrical property in wet environment can be obtained, increase volume electricity Resistance；Insert belt goods, its wearability can be improved, increase tearing toughness；Insert shoe sole article, can To increase the flex life of sole, improve the wearability of sole；Kaolin also has an outstanding feature, it is simply that It inserts plastics, and composite can be made to have ultrared barrier, inserts hot house film and has prominent To ultrared obstruct and insulation effect.Its wavelength 98% of the light from the sun received on the earth collects In in 0.3-3.0 μ m, be divided into ultraviolet light (0.3～0.4 μm), visible ray (0.4～0.8 μm) and infrared Light (more than 0.8 μm) three parts. wherein, carry out photosynthetic visible ray for crops daytime and mainly turn Turn to tellurian heat energy.Night distributes the main shape of heat i.e. the 90% of energy from earth surface to atmosphere Formula is with the infrared radiation of 7～25 μm. its peak value is 11～13 μm.It is fastened as with agricultural plastic film Booth, mainly make temperature of shed be far above outside canopy, make crops be able to early to germinate, the most ripe, even if In cold season, in canopy, crop can grow the most in the same old way, and the common poly-second without infrared light barrier Alkene thin film is very poor to the obstructing capacity of infrared light, less than 25%, therefore, although solar energy passes through by day Canopy film, changes into heat energy in energy is stayed canopy, and in making grid, temperature raises；But at night, due to canopy film pair Infrared light barrier is poor, major part heat still can be lost to outside canopy with forms of radiation, straw screen or mat be do not stop red Outside line.To this end, the thickness of canopy film can only be increased, but this method is not only the most limited to improving barrier, And limited by the cost of film and be also impossible to unrestrictedly increase.Only way is exactly, will be to infrared light The material having iris action is added in plastic sheeting, when making infrared radiation to canopy film, it is impossible to penetrate. and It is reflected back again in canopy, reaches the effect of hot house insulation.Additionally, daily plastic, household electrical appliance, Automobile component, construction material and universal industrial plastics aspect, Kaolin is often other non-gold as filler Belong to what mineral cannot replace.Kaolin, in addition to having above-mentioned function, also has particularly preferred to essence Adsorptivity, inserts plastics and can manufacture the plastic of band fragrance.

Ethylene-acrylic acid copolymer (EAA) is a kind of resin, and the carboxylic acid group that it contains has following effect: 1. increase Add the adhesion of each component, the compatibility in formula；2. some physical properties are improved, such as hot strength, impact Intensity, resisting environmental stress and cracking intensity；3. the flexibility of material is increased；4. the grease resistance of material is increased.

Embodiment:

Formula: Kaolin (1250 mesh) 70%, stearic acid 3%, Tissuemat E 14%, LDPE (melt index (MI) 7) 10%, ethylene-acrylic acid copolymer 3%.

First Kaolin and stearic acid are put into super mixer, mixed at high speed 15 minutes, completes the powder body of the first step Process.Then all material is put into full super mixer, carries out mixed at high speed, until Tissuemat E melts Powder body is coated with.Modified materials will be given again and put into dual-screw pelletizer group pelletize, complete pelletize.

This masterbatch is inserted in polypropylene F401 by we, masterbatch addition 20% (weight portion), measured performance:

Masterbatch 20%+ polypropylene F401 composite measured performance

Claims

1. the present invention " insulation of hot house film heats masterbatch " is technically characterized in that and enables awning film itself to stop temperature to outflow (i.e. intercepting infrared ray), particularly keep nocturnal temperature in booth, effect can more preferably, and universal experience can improve in booth nocturnal temperature 4～5 DEG C.

Kaolin powder treatment technology.

The present invention " insulation of hot house film heats masterbatch " is technically characterized in that and enables awning film itself to stop temperature to outflow (i.e. intercepting infrared ray), particularly keep nocturnal temperature in booth, effect can more preferably, and universal experience can improve in booth nocturnal temperature 4～5 DEG C.

Manufacturing powder body with Ore is to pulverize with machinery mill combination, and higher level is to pulverize by airflow milling, and Ore is crushed destroys chemical bond (covalent bond, ionic bond, the metallic bond being combined into Ore；Noncrystal longrange disorder, shortrange order, crystal long-range order) become powder body.The knot of powder body is poly-is that the surface by powder particle can combine, and the surface of material can be much smaller than chemical bond energy, therefore can open the particle of these reunions with the kinetic energy of super mixer leaf wing；After shutting down, the particle opening reunion also to be reunited, particle will be coated with by this when not shutting down, the time of cladding is just right, can not be coated with before particle aggregation is not switched on, particle aggregation to be coated with after opening immediately, this point to be reached, can be selected for the solid of low melting point, effect is had with hydroxyl and the oxy radical of Kaolin particle surface, the material good with the matrix resin compatibility, such as stearic acid (fusing point 69.6 DEG C), when the particle of the powder reuniting in super mixer is opened, the stearic acid being mixed into together with powder body melts just by powder body mill sassafras heat, coated powder particle immediately.Complete kaolin powder.

2. the present invention " insulation of hot house film heats masterbatch " is technically characterized in that and enables awning film itself to stop temperature to outflow (i.e. intercepting infrared ray), particularly keep nocturnal temperature in booth, effect can more preferably, and universal experience can improve in booth nocturnal temperature 4～5 DEG C.

Pre-modified materials manufacturing technology.

PV=Δ U-Δ F-T Δ S

PV represents process

T Δ S absolute temperature T and the product of Entropy Changes Δ S, entropy is the dispatcher of system, and Δ S ＞ 0 system is absorbed heat, Δ S ＜ 0 system heat release.

The change of energy in Δ U table, U is the cashier of system, and Δ U is timing, and table+Δ U is draw heat, and when Δ U is negative, table-Δ U is exothermic

The change of Δ F table process free energy.Δ F=Δ U-PV-T Δ S.

When Δ F ＜ 0 is negative, process is carried out automatically；When Δ F=0 is zero, process reaches to balance and does not carry out；When Δ F ＞ 0 is more than zero, process is carried out round about.We want process and automatically carry out it is necessary to it is negative for making Δ F.

Pre-modified materials is manufactured by second law of thermodynamics formula-Δ F=-Δ U+PV+T Δ S.Wherein-Δ U is negative, and process is heat release.Δ S ＜ 0 system heat release.

Formula: Kaolin (1250 mesh) 70%, stearic acid 3%, Tissuemat E 14%,

LDPE 1F7B (melt index (MI) 7) 10%, ethylene-acrylic acid copolymer 3%.

First Kaolin and stearic acid are put into super mixer, mixed at high speed 15 minutes, completes the powder handling of the first step.Then all material is put into full super mixer, carries out mixed at high speed, until powder body is coated with melted for Tissuemat E by process heat release.Complete the manufacture giving modified materials.Give modified material pelleting extremely easily with this, both made in single screw pelletizer group, also can the most successfully pelletize.

3. the present invention " insulation of hot house film heats masterbatch " is technically characterized in that and enables awning film itself to stop temperature to outflow (i.e. intercepting infrared ray), particularly keep nocturnal temperature in booth, effect can more preferably, and universal experience can improve in booth nocturnal temperature 4～5 DEG C.

Kaolin masterbatch manufactures.By second law of thermodynamics formula:

PV=Δ U-Δ F-T Δ S Δ S ＞ 0

System is absorbed heat, as long as heating, process can be carried out.

Machinery heating, with dual-screw pelletizer group pelletize.Earnestly pelletize, tie rod water-cooled pelletize.Pelletize is to do the routine techniques that the people of plastics everybody knows, and repeats no more.