阅读说明：本技术 一种轻质环保复合墙板制造方法 (Manufacturing method of light environment-friendly composite wallboard ) 是由 王丽 陈秀兰 于 2019-09-19 设计创作，主要内容包括：本发明属于建筑装饰材料技术领域,涉及复合墙板,尤其涉及一种轻质环保复合墙板制造方法,包括：将板面喷涂有异氰酸酯的薄型无醛纤维板置于模具底部,喷涂面向上,均匀倒入聚氨酯发泡材料；再将另一块板面喷涂有异氰酸酯的薄型无醛纤维板置于模具内,其喷涂板面与聚氨酯发泡材料接触；然后将模具置于热压机中,温度60～80℃、压力20～40kg/cm<Sup>2</Sup>下反应5～15min,自然冷却至室温,打开模具,去除边角余料后即得。本发明所用材料中不含甲醛,制备方法工艺简便,无污染,所制得的是绿色健康环保板材；且木质纤维板材料与聚氨酯发泡材料适当组合,所制备的复合墙板具有较好的物理力学性能、轻质、无醛、保温隔热、隔音等优点,可广泛应用于室内墙体装修领域。(The invention belongs to the technical field of building decoration materials, relates to a composite wallboard, and particularly relates to a manufacturing method of a light environment-friendly composite wallboard, which comprises the following steps: placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material; then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material; then placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm 2 And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product. The material used in the invention does not contain formaldehyde, the preparation method has simple and convenient process and no pollution, and the prepared green, healthy and environment-friendly plate is; and the wood fiber board material and the polyurethane foam material are combined properly, so that the prepared composite wallboard has the advantages of better physical and mechanical properties, light weight, no aldehyde, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall decoration.)

1. A preparation method of a light environment-friendly composite wallboard is characterized by comprising the following steps:

(1) placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material;

(2) then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material;

(3) placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm²And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product.

2. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the spraying amount of the isocyanate in the step (1) or (2) is 80-120 g per square meter.

3. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the spraying amount of the isocyanate in the step (1) or (2) is 100 g per square meter.

4. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 1-3 mm.

5. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 2 mm.

6. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: putting the die into a hot press in the step (3), wherein the temperature is 70 ℃, and the pressure is 30kg/cm²The reaction was carried out for 10 min.

7. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the polyurethane foam material in the step (1) or (2) is prepared by uniformly stirring and mixing a material A and a material B at a high speed, wherein the material A comprises 100-160 parts by weight and the material B comprises 100 parts by weight;

wherein the material A is isocyanate;

the material B comprises the following components in parts by mass: 20-100 parts of polyester polyol, 50-100 parts of polyether polyol, 0-5 parts of modified dimethylcyclohexylamine, 0-5 parts of triethanolamine, 0.1-5 parts of dibutyltin dilaurate, 0-5 parts of glycerol, 2-10 parts of sulfonated castor oil, 2-10 parts of polyether modified polysiloxane and 5-20 parts of wood powder.

8. The lightweight environment-friendly composite wallboard prepared according to the method of any one of claims 1-7.

9. The lightweight, environmentally friendly composite wallboard of claim 8, wherein: the light environment-friendly composite wallboard comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are thin aldehyde-free fiber boards, the middle layer is a polyurethane foam material, and the thickness of the polyurethane foam material is 10-100 mm.

Technical Field

The invention belongs to the technical field of building decoration materials, relates to a composite wallboard, and particularly relates to a manufacturing method of a light environment-friendly composite wallboard.

Background

With the development of society and the improvement of living standard of people, consumers put forward higher requirements on indoor decoration, in particular to the decoration of wall bodies. The brick wall is composed of two materials of bricks and mortar, and the bricks are cemented together by the mortar to build a wall body or a building block. The brick wall belongs to a masonry wall body and has the advantages of heat preservation, heat insulation, sound insulation and the like. However, the traditional brick wall also has the defects of low construction speed, large dead weight, high labor intensity, difficult carrying and dismantling and the like, and is partially replaced by a novel material.

The invention mainly aims at the defects of the traditional wall body and discloses a preparation method of a light environment-friendly composite wallboard, and the prepared wallboard has the advantages of light weight, no formaldehyde release, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall body decoration.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to disclose a preparation method of a light environment-friendly composite wallboard.

A preparation method of a light environment-friendly composite wallboard comprises the following steps:

(1) placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material;

(2) then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material;

(3) placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm²And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product.

In a preferred embodiment of the invention, the isocyanate is sprayed in the step (1) or (2) in an amount of 80-120 g per square meter, preferably 100 g per square meter.

In the preferred embodiment of the invention, the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 1-3 mm, preferably 2 mm.

In the preferred embodiment of the invention, the die in step (3) is placed in a hot press at 70 ℃ and 30kg/cm²The reaction was carried out for 10 min.

In a preferred embodiment of the invention, the polyurethane foam material in the step (1) or (2) is prepared by uniformly stirring and mixing the material A and the material B at a high speed, wherein the material A comprises 100-160 parts by weight, and the material B comprises 100 parts by weight.

Further, the material A is isocyanate;

the material B comprises the following components in parts by mass: 20-100 parts of polyester polyol, 50-100 parts of polyether polyol, 0-5 parts of modified dimethylcyclohexylamine, 0-5 parts of triethanolamine, 0.1-5 parts of dibutyltin dilaurate, 0-5 parts of glycerol, 2-10 parts of sulfonated castor oil, 2-10 parts of polyether modified polysiloxane and 5-20 parts of wood powder.

The preparation method of the material B comprises the following steps: weighing the components according to the proportion, putting polyester polyol, polyether polyol, modified dimethylcyclohexylamine, triethanolamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane into a reaction kettle, uniformly stirring and mixing at the rotating speed of 500-700 r/min, putting wood powder into the reaction kettle, and uniformly stirring and mixing at the rotating speed of 500-700 r/min to obtain a material B.

The production steps of the thin aldehyde-free fiberboard comprise: wood peeling → chipping → screening → washing → cooking → hot grinding → fiber drying → glue mixing → paving and shaping → prepressing → hot pressing → cooling → sanding → preserving → inspection and sorting → packaging and warehousing.

In the paving and forming step, the density of paving fibers is adjusted, and the density of the aldehyde-free thin fiberboard is 900-960 kg/m for thin year;

in the glue blending and applying step, the adhesive is isocyanate, and the glue applying amount is 55-65 kg/m for carrying out heavy planting;

in the curing step, the moisture content of the thin aldehyde-free fiberboard is 5.0-6.5% by adjusting the temperature and the humidity of the curing environment.

The light environment-friendly composite wallboard prepared by the method comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are thin aldehyde-free fiber boards, the middle layer is a polyurethane foam material, and the thickness of the polyurethane foam material is 10-100 mm.

According to the method, the density of the conventional aldehyde-free fiber board is 780-880 kg/m, and the application amount of isocyanate is 25-40 kg/m, the density of the upper surface layer fiber board and the lower surface layer fiber board of the light environment-friendly composite wallboard manufactured by the method is 900-960 kg/m, the application amount of isocyanate is 55-65 kg/m, and the aldehyde-free fiber board with high application amount and high density is used as the upper surface layer and the lower surface layer, so that the density of the core layer polyurethane foaming material can be reduced, the sound absorption effect of the composite wallboard is improved, the performance of the composite wallboard can be guaranteed, and the production cost can be reduced. The glycerol and the sulfonated castor oil are added into the polyurethane foam material, the regularity of the internal molecular structure of the foam material can be damaged properly, the formed cross-linked bonds can limit the slippage between molecular chains, and the deformation resistance of the foam material is improved, so that the performance of the composite wallboard is improved; the polyether modified polysiloxane is added, so that the foaming process is more stable, and the phenomenon that excessive large bubbles generate gaps and delamination is avoided, so that the performance of the composite wallboard is more stable. The sanding powder of the production line is generally used as fuel, and the sanding powder is used as the filler, so that the cost of the polyurethane foam material can be reduced, the porosity of the foam material can be increased, the mechanical property is improved, the energy waste caused by the sanding powder serving as the fuel is avoided, and the effect of saving resources is achieved.

The polyester polyol, the polyether polyol, the modified dimethyl cyclohexylamine, the triethanolamine, the dibutyltin dilaurate, the glycerol, the sulfonated castor oil and the polyether modified polysiloxane are all industrial products; the wood powder is sanding powder in the production of the fiberboard and is crushed to 200-300 meshes.

Advantageous effects

The invention discloses a light environment-friendly composite wallboard, which comprises an upper layer structure, a middle layer structure and a lower layer structure, wherein the upper layer structure and the lower layer structure are high-density thin aldehyde-free fiber boards, and the middle layer structure is a polyurethane foam material. The materials used in the invention do not contain formaldehyde, the preparation method has simple and convenient process and no pollution, and the prepared green, healthy and environment-friendly plate is; and the wood fiber board material and the polyurethane foam material are combined properly, so that the prepared composite wallboard has the advantages of better physical and mechanical properties, light weight, no aldehyde, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall decoration.

Detailed Description

The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.