CN104227820A - Preparation method for fireproof oriented strand board - Google Patents

Abstract

The invention relates to a preparation method for a fireproof oriented strand board. The method is characterized by comprising the following steps of (1) drying: drying a wood shaving by virtue of a drying oven, wherein the drying temperature is 103 DEG C; (2) addition of a flame retardant and an auxiliary: placing the wood shaving in a stirrer, and uniformly spraying a compounded aqueous solution of boric acid/borax and dodecyl dimethyl betaine onto the shaving; (3) re-drying: drying the shaving to which the flame retardant and the auxiliary are added, wherein the moisture content of the dried wood shaving is 3 to 5 percent; (4) adhesive application: placing the wood shaving into the stirrer again, and spraying a phenolic resin adhesive onto the shaving. According to the method, the prepared oriented strand board with a flame retardant property has strong internal bonding strength, and the method can be applied to the large-scale preparation of boards.

Description

Method prepared by fire prevention oriented wood chipboard

Technical field

The present invention relates to a kind of method being manufactured fire-proof board by wooden shavings.

Background technology

Along with China's wildwood resource constantly reduces, the taboo that fast-growing woods constantly increases and country puts into effect cuts down wildwood, limit cuts down the enforcement of the policy of big-diameter wood, make with artificial fast-growing woods and small dimension wood as raw material, have bending strength high, linear expansion coefficient is little, and good stability, nail-holding ability are strong, consumption glue amount is low, moderate, and the oriented wood chipboard (OSB) of the features such as raw material sources are wide obtains and develops energetically.Meanwhile, because particieboard has inflammability, make its application is in a lot of fields restricted, in order to overcome this shortcoming still, in order in large-scale manufacture easily with without error and effective mode prepares fire prevention OSB plate, need to think better of a lot not by the technical problem of any above-mentioned document solution mentioned, to provide the effective ways producing fire prevention OSB plate, be necessary that the speed operated can not hinder or interrupt other treatment steps relevant to the manufacture of extensive OSB plate carries out the dipping of wood shavings.This patent intends adopting the characteristic alkyl betaine of the zwitterionic compound had to be modifier, can encase the Small molecular fire retardant being unfavorable for adhesive solidification, effectively reduces fire retardant to the negative effect of composite wooden material physical and mechanical property.

Summary of the invention

Improving one's methods of the fire-proof board that the object of the present invention is to provide a kind of manufacture to be formed by wooden shavings, the method can be applied to the extensive preparation of described sheet material, wherein decreases the problems referred to above and other problem.

Other objects of the present invention are to provide the fire-proof board formed by wooden shavings, and it is applicable to interior door purposes as construction material.

According to the present invention, above and other object is realized by the method being manufactured fire-proof board by wooden shavings, and the method comprises to the following steps of definite sequence:

(1) dry: wood wool is carried out drying by baking oven, and baking temperature is 103 DEG C, after dry, the moisture content of wood wool is 3 ~ 5%;

(2) fire retardant and auxiliary agent is added: put wood wool into agitator, the aqueous solution of composite good borax/boric acid and dodecyldimethylammonium hydroxide inner salt is evenly sprayed onto on wood shavings, consisting of of compound aqueous solution: boric acid 5 parts, borax 5 parts, dodecyldimethylammonium hydroxide inner salt 1 part, 6 parts, water;

(3) again dry: carry out drying to the wood shavings adding fire retardant and auxiliary agent, after dry, the moisture content of wood wool is 3 ~ 5%;

(4) applying glue: again put wood wool into agitator, synvaren is sprayed onto on wood shavings.

Described step 3) described in baking temperature be 180 DEG C.

The invention has the advantages that:

The internal bond strength with the oriented wood chipboard of fire resistance adopting the inventive method to prepare is high, although compared with not containing the internal bond strength of fire retardant, internal bond strength slightly declines, but do not reduce the grade of oriented wood chipboard, the oriented wood chipboard of fire resistance that prepared by the inventive method have reaches the load-bearing sheet material requirement that oriented wood chipboard in professional standard LY/T1580-2010 uses in the dry state.

Adopt the inventive method prepare have the oriented wood chipboard of fire resistance elastic modelling quantity and MOR reach professional standard LY/T1580-2010 " oriented wood chipboard " the 5th part: the load-bearing sheet material used under dampness requires (OSB/4 type).

Detailed description of the invention

The wooden shavings used in the embodiment of the present invention is willow wood shavings, and other any wooden shavingses, lumber fibre are all suitable for and the present invention.

Embodiment:

The method comprises to the following steps of definite sequence:

(1) dry: wood wool is carried out drying by baking oven, and baking temperature is 103 DEG C, after dry, the moisture content of wood wool is 3 ~ 5%;

(2) fire retardant and auxiliary agent is added: put wood wool into agitator, the aqueous solution of composite good borax/boric acid and dodecyldimethylammonium hydroxide inner salt is evenly sprayed onto on wood shavings, consisting of of compound aqueous solution: boric acid 5 parts, borax 5 parts, dodecyldimethylammonium hydroxide inner salt 1 part, 6 parts, water;

(3) again dry: carry out drying to the wood shavings adding fire retardant and auxiliary agent, after dry, the moisture content of wood wool is 3 ~ 5%;

(4) applying glue: again put wood wool into agitator, synvaren is sprayed onto on wood shavings.

Described step 3) described in baking temperature be 180 DEG C, the time is 20 minutes.

Other advantages of the present invention and change are apparent for a person skilled in the art.Therefore, the present invention is not limited to the specific detail that represents and describe and preferred embodiment here.Thus, various change can be carried out when not departing from the technical scope of the present invention or purport that are defined by claims.

Claims (2)

1. a method prepared by oriented wood chipboard of preventing fires, is characterized in that comprising the steps:

(1) dry: wood wool is carried out drying by baking oven, and baking temperature is 103 DEG C, after dry, the moisture content of wood wool is 3 ~ 5%;

(2) fire retardant and auxiliary agent is added: put wood wool into agitator, the aqueous solution of composite good borax/boric acid and dodecyldimethylammonium hydroxide inner salt is evenly sprayed onto on wood shavings, consisting of of compound aqueous solution: boric acid 5 parts, borax 5 parts, dodecyldimethylammonium hydroxide inner salt 1 part, 6 parts, water;

(3) again dry: carry out drying to the wood shavings adding fire retardant and auxiliary agent, after dry, the moisture content of wood wool is 3 ~ 5%;

(4) applying glue: again put wood wool into agitator, synvaren is sprayed onto on wood shavings.

2. method according to claim 1, is characterized in that step 3) described in baking temperature be 180 DEG C.