200 Micron UV Resistant Single Span Plastic Film Greenhouse for Sale

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Production intruduction

Types and characteristics of greenhouse films

(1) Polyethylene ordinary film (PE)

It has good light transmittance, and the light transmittance of the new film is about 80%; it has weak dust absorption, and does not have the phenomenon of excessive dust absorption (stickiness) caused by the precipitation of plasticizers like polyvinyl chloride film (PVC). It has strong low temperature resistance, the low temperature embrittlement degree is -70℃, and it can still maintain softness at -30℃. The relative density is 0.92 g/cm3, and the infrared transmittance is as high as over 70%. The thermal insulation performance at night is poor, not as good as PVC film. It has heavy fog drop resistance and poor weather resistance. It has a service life of 4 to 5 months. It is not light-resistant and has a high-temperature softening degree of 50°C. Therefore, it is not suitable for cover cultivation in high-temperature seasons. It can be used for cover cultivation in early spring and delayed in late autumn. It is not easy to bond after tearing. There is no suitable repair adhesive at present, and it can only be heat-sealed when the sheets are combined.

(2) Polyethylene longevity film

It uses polyethylene as the base resin, adds a certain proportion of ultraviolet absorbers, anti-aging agents and antioxidants, and then blow molds it. It has good weather resistance and a service life of 1.5 to 2 years. The thickness is 0.1 to 0.12 mm, and the film amount per 667 meters is 100 to 120 kilograms. The width has a folded diameter of 1 meter, 1.5 meters, 2 meters, 3 meters, 3.5 meters, and 4 meters. That is, the single width after opening is 2 meters. Meters, 3 meters, 4 meters, 6 meters, 7 meters and 8 meters are available. The application area has expanded rapidly in recent years. Although the one-time investment is larger, the service life is long and can be used for almost four crops, making it more economical than ordinary PE film.

(3) Polyethylene drip-free longevity film

It is made of polyethylene as the base resin, adding anti-aging agent and non-drip additives and then blow molding. It has good weather resistance and has a service life of more than 1.5 to 2 years. No condensation. The thickness is 0.1 to 0.12 mm, and the dosage is 100 to 130 kilograms per 667 meters. The width has folding diameters of 1 meter, 1.5 meters, 2 meters, 3 meters and 3.5 meters. It is suitable for various greenhouses and greenhouses. It can also be used in The greenhouse and greenhouse should be covered with two curtains.

(4) PVC ordinary film

Agricultural film made of polyvinyl chloride as the base resin. It is resistant to high temperatures and sunlight, and its thermal insulation performance at night is better than that of polyethylene film. It is resistant to aging and has lighter fog droplets. After the film is torn or broken, it can be bonded with adhesive, making it easy to repair. The thickness is 0.1~0.12 mm, and the width and diameter range from 1 meter, 2 meters, and 3 meters. The dosage is 130 to 150 kilograms per 667 meters, and the relative density is 1.25 g/cm3. The equivalent coverage area is 24% more than that of polyethylene film of the same thickness. The new film has good light transmittance, but as the As the covering time increases, the plasticizer gradually precipitates and the film surface becomes sticky, making it highly dust-absorbent and difficult to clean. It quickly reduces the light transmittance and has poor low-temperature resistance, with a low-temperature embrittlement degree of -50. ℃, the hardening degree is -30 ℃; PVC film is more suitable for areas with less wind and dust, especially suitable for use in northern areas that require night-time heat preservation cultivation.

(5) Multifunctional membrane

Using polyethylene as the base resin, a variety of additives are added, such as drip-free agents, heat preservation agents, aging-resistant agents, etc., to make a film with multiple functions such as longevity, drip-free, and heat preservation, and achieve multiple effects at the same time. In terms of processing technology, one is to mix the basic resin and various additives evenly and then blow molding into a film; the other is a composite film, such as a three-function composite film, with drip-free agent added to the inner layer and ultraviolet absorption added to the middle and outer layers. agent and blown into a multifunctional composite film. The thickness is 0.06~0.08 mm, the service life is more than 1 year, it has good light transmittance and heat preservation, heats up quickly on sunny days, and has heat preservation effect at night. It is suitable for large, medium and small sheds, greenhouses and as a second curtain. Because it is thin, The membrane covers a large area per unit weight, and only requires 60 to 100 kilograms per 667 m2.

(6) Diffuse reflective film

Polyethylene is used as the base resin with a certain proportion of diffuse reflection crystal nuclei added. When direct sunlight passes through this film, it is converted into flat light under the action of the diffuse reflection crystal nucleus, and is evenly injected into various parts of the greenhouse, reducing direct radiation. The transmittance of light can not only reduce the high temperature peak in the shed around noon, reduce the damage of high temperature to crops, but also contribute to the uniformity of plant growth in the shed. At the same time, it has better thermal insulation at night, and the accumulated temperature of the greenhouse is higher than that of ordinary PE and PVC agricultural films.

(7) Polyethylene dimming film (light conversion film)

It is a new type of plastic film that is blow-molded using low-density polyethylene (LDPE resin) as the basic raw material and adding a light conversion agent. It can convert ultraviolet light in natural light into red light and infrared light, reducing ultraviolet light that is not beneficial to plants. The increase of red light and infrared light can improve the photosynthetic utilization rate of plants, strengthen photosynthesis, and increase the indoor and ground temperatures in the greenhouse. This kind of agricultural film has the characteristics of longevity, aging resistance and good light transmittance. The thickness is 0.08 to 0.12 mm, the fold radius is 1 to 5 meters, the tensile strength is greater than or equal to 13 mPa, the elongation at break is greater than 305%, and the right-angle tear strength is greater than or equal to 50 kg/m. The service life is more than 2 years, the light transmittance is more than 85%, and the warming effect is not significant under low light.

Bonding Methods

1. Agent bonding method. Mainly use vinyl chloride resin plastic glue to bond and repair polyvinyl chloride film. Polyethylene film can be repaired with polyurethane adhesive, and sometimes it can be ironed with a small hot steel saw blade.

2. Mud sticking method. In the process of using the greenhouse film, if there are small damages such as scratches or wrinkles, you can cut a piece of plastic and paste the mud water on the damaged place.

3. Hot bonding method. The heat, downward pressure, and advancing speed of the electric iron used should be so that the two films under the paper will soften and stick together to a certain extent after being heated, and then peel off the paper strips and stick them together. One section of the film is pulled to the other end of the wooden strip, and then the next section is repeatedly bonded, cyclically, until the film is connected to the required length.

Standard exporting packing

FAQ

Q:Are you manufacturer?

A:Yes, we are manufacturer factory located in Chongqing. Most welcome to visit!

Q:What is your lead time?

A:Within 30 days after receive your deposit

Q:What are your payment terms?

A: 70% down payment against commercial invoice, 30% payment upon notification ready for shipment. T/T ,Paypal, Bank transfer all acceptable. Can be negociated.

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