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Agricultural covering material

A covering and agricultural technology, applied in agriculture, agricultural machinery, agricultural machinery and machinery, etc., can solve the problems of excessive rainwater immersion, light weight, poor transparency, pest intrusion, etc., and achieve high light transmittance and thermal insulation. Excellent, crop protection effect

Active Publication Date: 2014-04-16
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, agricultural covering materials made of nonwoven fabrics made of thick fibers have high air permeability, so the ground temperature that has been warmed up after a long time will radiate heat during bad weather and at night, and the growth promotion effect of heat preservation will be weakened. or rainwater intrusion so much that it may cause flooding inside
In addition, non-woven fabrics made of thick fibers tend to locally produce parts with poor uniformity of the non-woven fabric, and there are problems such as breakage of the non-woven fabric and invasion of pests.
In order to improve these problems, when nonwoven fabrics made of fine fibers are used, although the thermal insulation effect can be obtained, the diffuse reflection effect of light becomes high due to the thin fibers, and the light transmittance is impaired. Therefore, the balance of the above performance Possibly worse, can't choose
[0007] In addition, Patent Document 2 (Japanese Utility Model Registration No. 2501455) proposes an agricultural nonwoven sheet (sheet), which uses a multi-sheet weight of 15 to 30 g / m 2 synthetic fibrous nonwoven fabrics are overlapped and partially integrated, but as described in the examples, in the case of laminating nonwoven fabrics made of fibers with a thickness of 8 denier (about 35 μm), heat preservation Excellent performance, on the contrary, light weight and transparency may be poor

Method used

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  • Agricultural covering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0086] Using a propylene homopolymer (PP-1) with an MFR of 20g / 10min, melt spinning at 230°C, the resulting fibers were deposited on the collection surface, and the fibers were obtained with a diameter of 40μm and a mesh weight of 9g / m 2 The spunbonded nonwoven layer (B-1).

[0087] Then, the propylene homopolymer (PP-2) with an MFR of 400 g / 10 minutes was melted at 280°C with an extruder, and the resulting melt was discharged from the spinneret while blowing 280°C The melt-blown method of heating air, depositing fibers with a fiber diameter of 3 μm on the above-mentioned spunbonded nonwoven fabric (B-1) to form a basis weight of 0.5 g / m 2 The melt-blown nonwoven fabric (A-1) was laminated on it with the same spunbonded nonwoven fabric (B-2) as the above-mentioned spunbonded nonwoven fabric (B-1), with a marking area ratio of 18 % hot embossed rolls to integrate the three layers to obtain an agricultural covering material in which a spunbond nonwoven fabric (hereinafter refer...

Embodiment 2）

[0090] Except that the agricultural covering material used in Example 1 was replaced by spunbonded nonwoven fabrics and meltblown nonwoven fabrics having the fiber diameters and mesh weights described in Table 1, the agricultural covering materials were obtained in the same manner as in Example 1. material.

[0091] The obtained covering material for agriculture was evaluated by the method described above. The results are shown in Table 1.

[0092] (Reference example 1, 2)

[0093] Except that the agricultural covering material used in Example 1 was replaced by spunbonded nonwoven fabrics and meltblown nonwoven fabrics having the fiber diameters and mesh weights described in Table 1, the agricultural covering materials were obtained in the same manner as in Example 1. material.

[0094] The obtained covering material for agriculture was evaluated by the method described above. The results are shown in Table 1.

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Abstract

The purpose of the present invention is to provide a highly uniform and appropriately air-permeable agricultural covering material, which sustains a high light transmittance so as to promote crop growth and enable a cultivator to visually monitor the inside thereof, allows the maintenance of soil temperature and thus exerts a good growth promotion effect, can prevent the excessive invasion of rainwater, shows no irregularity in strength and has good performance of preventing entry of harmful insects. The agricultural covering material comprises a non-woven fabric laminate, said non-woven fabric laminate having (i) a light transmittance of 80% or higher; (ii) an air permeability within a range of 50-400 cm3 / cm2 / sec; and (iii) a weight per area within a range of 10-30 g / m2.

Description

technical field [0001] The present invention relates to an agricultural covering material composed of a nonwoven fabric laminate, in particular to a nonwoven fabric laminate suitable for open-air cultivation, shed cultivation, greenhouse cultivation, and direct covering (full covering) applications. agricultural covering materials. Background technique [0002] Agricultural covering materials are widely used to protect crops against changes in the external environment and to help their growth and development. Covering materials for agriculture can be broadly classified into films and non-woven fabrics, and are used according to their characteristics. [0003] The film has no air permeability or low air permeability, but has high barrier and high transparency (or high light-shielding), for example, it is used for heat preservation in severe winter (greenhouse cultivation), to prevent fruit from being soaked by rain, to suppress weed growth, to prevent Uses such as flying pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/02A01G9/14D04H1/544D04H3/16
CPCB32B5/26A01G13/0268B32B5/022B32B27/32A01G9/1438D04H13/002D04H1/4374B32B2250/03B32B2410/00B32B2262/0253B32B2250/20D04H1/4291B32B2307/412B32B2307/724D04H1/559D04H1/56D04H3/16Y10T428/24942Y02A40/25
Inventor 市川太郎津田武
Owner MITSUI CHEM INC
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