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Manufacturing method for crop straw building external wall heat insulation plate

A technology of crop straws and building exterior walls, applied in the pretreatment of molding materials, flat products, manufacturing tools, etc., can solve environmental problems such as smoke and dust, environmental pollution, etc., achieve low production costs, reduce environmental pollution, and save petrochemical resources Effect

Active Publication Date: 2016-03-09
NINGBO ZHONGJIA LOW CARBON NEW TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no better treatment method and utilization experience, and the main method is incineration, which has caused serious environmental problems such as smoke and haze. Therefore, it is urgent to solve the environmental pollution problem caused by burning straw in our country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The wheat straw is cut into short pieces of about 5 cm, and then crushed into needle-shaped shavings by a ring flaker or other machinery. Then, the straw scraps and synthetic fibers such as polyester (or polyethylene, polypropylene) (the amount of synthetic fibers added is 10% of the total amount of materials), are mixed and opened in two stages by a mixing opener, and it is made into Straw scrap / synthetic fiber homogeneous mixture. The mixed material is paved by a hybrid fiber air-laying machine to make a uniformly distributed hybrid fiber slab. The slab is then needled two to three times to make a mixed fiber mat. Spray a composite adhesive mixed with a flame retardant and an anti-corrosion / fungal agent on the mixed fiber mat (the amount of the composite adhesive is 15% of the total amount of the material), and then go through hot pressing (temperature 140 ° C, board surface hot pressing pressure 0.5 MPa) , time 20 minutes) to make the composite adhesive in the mixe...

Embodiment 2

[0026] The mixed straw (in any proportion) of wheat straw and rice straw is cut into short materials of about 5 cm, and then made into shavings by a hammer mill. Sieve the crushed material, remove the fine powder, and combine it with synthetic fibers such as polyester (or polyethylene, polypropylene) (the amount of synthetic fiber added is 15% of the total amount of materials), and carry out two stages of mixing and opening through a mixing and opening machine. Mixing and opening, it is made into a homogeneous straw scrap / synthetic fiber mixture. The mixed material is paved by a hybrid fiber air-laying machine to make a uniformly distributed hybrid fiber slab. The slab is then needled two to three times to make a mixed fiber mat. Spray phenolic resin adhesive on the mixed fiber mat (the amount of adhesive is 10% of the total amount of material), and then through hot pressing (temperature 130 ° C, board surface hot pressing pressure 0.2MPa, time 30 minutes) to make the adhesiv...

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PUM

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Abstract

The invention provides a manufacturing method for a crop straw building external wall heat insulation plate. The method includes the steps that wheat straw, rice straw, cotton stalks and other agricultural leftovers are used as the raw materials; the technological processes of chopping smashing, mixing opening, airflow laying, acupuncturing felt forming, gluing sizing and curing, inflaming retarding, corrosion and mildew preventing treating, dicing molding and the like are conducted; and finally the light and durable building external wall heat insulation plate with the inflaming retarding and sound insulating functions is manufactured. Development of green buildings of our country is facilitated, energy consumption of buildings is greatly lowered, and efficient and high-additive value recycling of crop straw is achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing thermal insulation boards for building exterior walls by using crop straws. Background technique [0002] In modern buildings, the energy consumption of buildings accounts for more than 30% of the total energy consumption. To reduce carbon emissions, building energy efficiency is very important. In order to achieve better building energy-saving requirements, it is one of the necessary measures to adopt external wall insulation treatment in modern buildings. The current popular external wall insulation boards are mainly EPS (expanded polystyrene foam), XPS (extruded polystyrene foam), PUR (hard polyurethane foam) and PIR (hard polyisocyanate foam), etc. constitute. The main disadvantage of these materials is that they are flammable (although they are partially flammable, they also have a large amount of smoke), and the gas is poisonous and extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/02B27N3/14B27N3/12
CPCB27N1/02B27N3/12B27N3/143
Inventor 王正王建和葛文枝葛诗健刘斌
Owner NINGBO ZHONGJIA LOW CARBON NEW TECH RES INST
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