阅读说明：本技术 一种增强木门抗冲击性的生产工艺 (Production process for enhancing impact resistance of wooden door ) 是由 赵卫 于 2019-10-22 设计创作，主要内容包括：本发明涉及木材加工处理技术领域,公开了一种增强木门抗冲击性的生产工艺,在木门加工过程中,将制备得到的脲醛树脂经过多孔材料的改性处理后对木门进行涂胶热压处理,通过金属-非金属络合物对脲醛树脂进行改性,解决了脲醛树脂胶黏剂在木板粘合中耐候性较差,初粘性不佳,收缩性大、不耐水、易老化的问题,能够提高木门的抗变形性,增强了胶黏剂的粘结性能,同时,改性剂中的多孔成分具有吸附作用,还能够与释放的甲醛发生缔合,形成稳定的化学键,在很大程度上降低了脲醛树脂类胶黏剂中游离甲醛的释放量。(The invention relates to the technical field of wood processing, and discloses a production process for enhancing the impact resistance of a wooden door.)

1. A production process for enhancing the impact resistance of a wood door is characterized by comprising the following steps:

(1) weighing 14-17 g of white carbon black and 9.5-10.0 g of zinc oxide, placing the white carbon black and the zinc oxide into a beaker, adding 110 ml of sodium hydroxide solution into the beaker under stirring, placing the beaker into a 70-80 ℃ water bath kettle for heating after dissolving, slowly adding 25-30 ml of sodium pyrophosphate aqueous solution with the molar concentration of 1.7-1.9 mol/L under stirring, dropwise adding the sodium pyrophosphate aqueous solution at the speed of 100 ml/h and 120 ml/h, continuously stirring for 30-40 min after dropwise adding, standing for 4-5 h, continuously heating to 96-100 ℃, evaporating and concentrating for 40-45 min, filtering the precipitate, washing for 3-4 times by using deionized water, and drying the obtained complex in a 80-90 ℃ drying box for 8-10 h;

(2) under the protection of nitrogen, the dried substance obtained in the step (1) is placed in a tubular furnace preheated at the temperature of 380-400 ℃ for sintering for 2-3 hours, the sintering temperature is 560 ℃ and 580 ℃, the porous spongy powder is obtained by natural cooling to the room temperature along with the furnace, the porous spongy powder is added into the calcium acetate solution, the material-liquid ratio is 1:13-15, ultrasonic treatment is carried out for 7-8 minutes, the obtained ultrasonic mixture is added into the urea-formaldehyde resin adhesive according to the mass ratio of 1:25-30, rapidly stirring for 20-25 minutes by using a stirrer, wherein the stirring speed is 300-;

(3) bonding the polished and polished wood boards by using the modified adhesive prepared in the step (2), placing the bonded wood boards on a hot press for pressing, wherein the pressing temperature is 123-.

2. The process for producing wood doors with enhanced impact resistance as claimed in claim 1, wherein the sodium hydroxide solution of step (1) has a mass concentration of 27-30%.

3. The process of claim 1, wherein the particle size of the porous sponge powder of step (2) is between 70 nm and 100 nm.

4. The process for producing wood doors with enhanced impact resistance as claimed in claim 1, wherein the calcium acetate solution of step (2) has a mass concentration of 14-16%.

5. The production process for enhancing the impact resistance of wood doors according to claim 1, wherein the ultrasonic treatment power in the step (2) is 40-50KW, and the temperature is 60-65 ℃.

6. The production process for enhancing the impact resistance of the wooden door as claimed in claim 1, wherein the solid content of the urea-formaldehyde resin adhesive in the step (2) is 46-48%.

7. The production process for enhancing the impact resistance of the wooden door as claimed in claim 1, wherein the amount of the modifying adhesive in the step (3) is 124 g/m and 128 g/m.

8. The process for producing the wood door with enhanced impact resistance according to claim 1, wherein the hot pressing pressure in the step (3) is 35 to 40 MPa.

Technical Field

The invention belongs to the technical field of wood processing, and particularly relates to a production process for enhancing the impact resistance of a wood door.

Background

With the development of modern precise technology, the traditional manual carving technology is combined and fused with each other, and natural wood is used as a raw material to be processed into a log door, so that the wood is popular with consumers.

Influenced by weather and natural properties of wood, even if the wood is subjected to a series of strengthening treatment before being processed into a wood door, the wood door still cannot resist the influence of aging and external force impact, so that the internal structure of the wood door is not high in strength and short in service life, and the impact resistance of the wood door is remarkably reduced along with the lapse of time. The existing processing mode adopts a plurality of boards to be bonded and pressed by using an adhesive to improve the impact strength of the wooden door, but the traditional adhesive component is still greatly influenced by the environment and time, the stability is poor, the influence from the outside is large, and the performance decays fast.

Disclosure of Invention

The invention aims to provide a production process for enhancing the impact resistance of a wooden door aiming at the existing problems, and solves the problem of the service performance reduction of the wooden door.

The invention is realized by the following technical scheme:

a production process for enhancing the impact resistance of a wood door comprises the following steps:

(1) weighing 14-17 g of white carbon black and 9.5-10.0 g of zinc oxide, placing the white carbon black and the zinc oxide into a beaker, adding 110 ml of sodium hydroxide solution with the mass concentration of 27-30% into the beaker under stirring, placing the beaker into a 70-80 ℃ water bath kettle for heating after dissolving, slowly adding 25-30 ml of sodium pyrophosphate aqueous solution with the molar concentration of 1.7-1.9 mol/L under stirring at the dropping speed of 100 ml/h and 120 ml/h, continuing stirring for 30-40 min after the dropping is finished, standing for 4-5 h, continuing heating to 96-100 ℃, evaporating and concentrating for 40-45 min, filtering the precipitate, washing for 3-4 times by using deionized water, and drying the obtained complex in a 80-90 ℃ drying box for 8-10 h;

(2) under the protection of nitrogen, placing the dried material obtained in the step (1) in a tubular furnace preheated at the temperature of 380-400 ℃ for sintering for 2-3 hours, wherein the sintering temperature is 560-580 ℃, the dried material is naturally cooled to room temperature along with the furnace to obtain porous spongy powder, adding the porous spongy powder into a calcium acetate solution with the mass concentration of 14-16%, the material-liquid ratio is 1:13-15, carrying out ultrasonic treatment for 7-8 minutes, the ultrasonic treatment power is 40-50KW, the temperature is 60-65 ℃, regulating and controlling the appearance, structure and composition characteristics of the modified powder through the mixing ratio, the sintering temperature and the sintering atmosphere, so that the particle size of the prepared porous spongy powder is 70-100 nanometers, the fusion capacity of the nano material with the size structure and the urea resin, the aging resistance and the acid and alkali resistance are obviously improved, and the specific surface area in contact with a plate can be increased, more holes can be formed in the modified adhesive, the obtained ultrasonic mixture is added into a urea resin adhesive with the solid content of 46-48% according to the mass ratio of 1:25-30, the mixture is rapidly stirred for 20-25 minutes by using a stirrer, the stirring speed is 300-320 turns/min, the temperature is raised to 77-80 ℃ after the stirring is finished, the temperature is kept for 30-40 minutes, a high-speed shearing machine is used for shearing, the shearing speed is 3000-3500 turns/min, the shearing time is 40-50 minutes, and the modified adhesive is obtained by natural cooling;

(3) bonding the polished and polished wood board by using the modified adhesive prepared in the step (2), wherein the consumption of the modified adhesive is 124-128 g/square meter, placing the wood board on a hot press for pressing, the hot pressing pressure is 35-40MPa, the pressing temperature is 123-126 ℃, the pressure rising time is 5-6 seconds, the pressing time is 10-14 minutes, cooling to 5-7 ℃ after the hot pressing is finished, cold pressing for 8-10 minutes under 70-75MPa, cleaning the pressed wood board after the hot pressing is finished, and further performing fine cutting, film pasting and spraying decoration.

Compared with the prior art, the invention has the following advantages: in order to solve the problem of insufficient shock resistance of the existing wooden door, the invention provides a production process for enhancing the shock resistance of the wooden door, in the processing process of the wooden door, the prepared urea-formaldehyde resin is subjected to modification treatment of a porous material and then is subjected to gluing hot-pressing treatment, the urea-formaldehyde resin is modified by a metal-nonmetal complex, the problems of poor weather resistance, poor initial adhesion, large shrinkage, poor water resistance and easy aging of a urea-formaldehyde resin adhesive in board adhesion are solved, the deformation resistance of the wooden door can be improved, the bonding property of the adhesive is enhanced, meanwhile, the porous component in the modifier has an adsorption effect and can be associated with released formaldehyde to form a stable chemical bond, the release amount of free formaldehyde in the urea-formaldehyde resin adhesive is reduced to a great extent, the shock resistance of the wooden door can be improved to 155 and 160kJ/m2, the anti-swelling rate is improved by 45-50%, the formaldehyde release amount is far lower than that of an untreated adhesive, and the method provided by the invention can produce the wood door with long service life, attractive appearance and strong impact resistance, can meet the requirement of modern people on high performance of the wood door, overcomes the defect that natural wood is easy to warp and deform, has good market prospect, and has important theoretical and practical significance for the wood door processing industry.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.