JPS60185883A - Production of woody floor sheet material - Google Patents

Abstract

PURPOSE:To obtain a floor sheet material having high abrasion resistance, excellent water- and corrosion-resistance, and excellent feeling to the body, by adding a urea resin to a cellulosic material dried to a specific water-content, drying and pulverizing the mixture, and adding the resultant fine powder of cured aggregate to a resin matrix. CONSTITUTION:A cellulosic material such as crushed chip, pulp, chaff, etc. is dried to a water-content of <=15wt%, crushed to disintegrate the fiber tissue, impregnated with a urea resin, and dried and pulverized at 100-250 deg.C to obtain neutralized and cured fine aggregate having a particle size of 100-150 mesh, water-content of 3-5wt% and pH of 6-7. The aggregate is added to a polyvinyl chloride resin or other resin in an amount of 5-40wt%, and formed in the form of a sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention has good wear resistance, water resistance, and 1i40 resistance!
l! The present invention relates to the provision of a floor sheet material that is highly flexible, has a good contact feel, and is easy to lay down.

Conventionally, this type of floor sheet material is often composed of a large foam board and a decorative sheet attached to the surface of the foam base plate, which has an appropriate cushioning function and heat insulation. , which is expected to have an effective sound-absorbing function.

However, conventional flooring materials that are hardy, mainly due to their cosmetic properties and tactile sensation characteristics, have problems in abrasion resistance and water resistance; Those that are mainly functional have problems in tactile sensation characteristics and cause sweating, etc. In addition, conventional floor sheet materials used in Kaheru were made from a variety of materials that had different functions, making their molding costs relatively high.

The floor sheet material according to the present invention has been specially devised in view of the inconveniences in the conventional examples, and has various characteristics of molding elements in accordance with the inherent characteristics. I added 4 liters of the cellulose yarn powder aggregate and poured it into a molding resin. In addition, the present invention provides a floor sheet material that has appropriate moisture absorption and slip resistance, and its composition is as follows: Moisture content of the material! The processed material is dried so that the forest content is within 15% to induce collapse of the fiber M1M%, and the processed material is impregnated with a urea-based resin liquid, and then the processed material is heated at 100°C to 100°C. A process of drying and crushing in a temperature range of 250°C to form a neutral fine and hardened aggregate with a pH of 16 to 7 (P), and adding this neutralized fine aggregate to vinyl chloride or other resin material. The following specific examples and the considerable detours associated with these examples are contemplated. .

The typical method for forming the wooden floor sheet material according to the present invention will be explained below. First, the flooring material to be prepared is made of a thermo-OT plastic resin material such as vinyl chloride, ABS resin, or polystyrene, and wood flour as a base. This includes mixed aggregate, calcium charcoal powder, hardening agent, stabilizer, coloring agent, foaming agent, etc. that are added as necessary.

The thermoplastic resin material used was determined and used based on the selection criteria that satisfies the various needs required for molded articles, and vinyl chloride resin is generally used in terms of molding characteristics and cost. It was used in

The aggregate used was then neutralized using the following procedure. That is, a cellulosic material such as crushed chip material, pulp material, or rice husk is prepared, and it is subjected to a drying process, especially a heat drying process, until the water content of the material is 15'.
It has been pre-processed to be within A. Step 1: Check the drying process. The moisture content in the village is also 1 to 15.
As the temperature decreases, the fiber structure of the material rapidly breaks down, causing the rough #! The composition of the cellulose in pulp material and rice husks, as well as the crushed chip material in the form of bundles or lumps of li fiber, is definitely destroyed, and the cellulose is separated into pieces.

Add an emulsion-type urea resin adhesive to the material that is visibly dry and has disintegrated,
By leaving it for 20 to 30 minutes, this urea-based resin adhesive will be sufficiently impregnated into the material, and the pH value will usually be around 5. Note that this resin adhesive will harden. It is necessary to add ammonia or hydrochloric acid as a separate agent to further adjust the pH of the material towards neutrality.
21 Kamame Gogozan-16 Thus, impregnation with urea resin liquid,
The cured material is heated to 100-250℃ in the next process.
The process of heat drying and crushing and pulverization was carried out within the range of
While trying to get it as close to 0% as possible, the particle size is 100 to 1.
It is made into a fine powder of about 50 grains.

During heating drying and crushing, the pH of the material itself (
It has an IQ in the range of 6 to 7, and is generally adjusted to be neutral.

The neutralization treatment of the resistant material at the starting point is largely dependent on the action of the urea resin adhesive Z and liquid interposed during the process, and the In simple heating and drying treatment of cellulose-based materials with no additives planned, the starting point is P) 15, whereas the final point material in the form of dry fine powder has a pH of 2 to 3, which is P)l. The value tends to be acidic. On the other hand, due to the intervention of urea-based resin adhesive, the material of PH5 is heated and dried during the process of loss of appearance and degrading. It is neutralized while being released as C dregs, and at the arrival point the pH of the material is adjusted to within the neutralization range of 6 to 7.

The aggregate thus provided is heat-treated during processing to reduce the water content in the aggregate to a maximum of 13%, ideally 3 to 5%, and even as much as possible to 0%.
In the subsequent resin molding with aggregate mixed in, there is no room for water vapor to be generated, and the wood acid contained is prevented from disassociating and volatilizing, eliminating any room for acidic scum to be generated, and is sufficiently neutralized. Its pH value is 6-7.

Thus, in the aggregate produced in L1, the wood acid contained in the wood powder, especially acetic acid gas, evaporates during the impregnation and heat molding of the thermosetting resin material using the urea resin as a living body. After being neutralized, the possibility of acid gas generation is effectively reduced compared to the aggregate used in the subsequent processing of mixing the aggregate into a resin material and molding it.

In addition, most of the water contained in the aggregate is evaporated due to the heating and drying process applied during aggregate molding, so there is no generation of water vapor, which is considered to be a problem in resin molding using molded aggregate. , there is no room for foaming, cavities, rough skin, etc. to occur in the molded product. In addition, the removal of this water content has a significant effect on the volatilization of wood acid contained in wood flour, and wood acid contained in wood flour usually reacts with H20J, 1 ( This is effectively suppressed since dissociation and volatilization only occur during the process of heat crushing and curing by impregnation with thermosetting resin material described in iiQ. In addition to the adjustment of P) 16 to 7 by neutralization, the generation of residual wood acid gas from the aggregate is more effectively suppressed.

The effective elimination and prevention of wood acid gas generation in the aggregate is extremely important in subsequent resin molding. In other words, when wood acid gas is generated during resin molding, the cylinder screw of the press, extruder, or injection machine used for resin molding, or the inner lit surface of the molding die or mold, is corroded by oxidation, which reduces its service life. In addition to drastically reducing the frequency, the molding efficiency is also reduced, leading to the problem of molding defects due to uneven extrusion and injection pressures.

Also, unlike the usual pure wood flour in the case of diagonal aggregate,
By impregnating or adhering a curable resin into the aggregate, the surface resistance value becomes extremely high, and the extrusion and injection pressure when molded by mixing it into a resin material as an aggregate becomes Xi. It is similar to that of general resin. On the other hand, in the past, the mixing of wood powder caused wood powder, sliding contact, and frictional resistance to the inner peripheral surfaces of cylinders, dies, etc., and when extrusion and injection were performed, cylinders, This causes scratches, abrasion, or damage on the inner circumferential surface of the

Furthermore, the use of such aggregates improves the compatibility with the mixed resin material, ensures uniform mixing of the aggregates, and also reduces the voids generated on the peripheral surface of the aggregate in the molded product. V-h 3
^” -Mari “Bo 0177%-CJ-Kip 9 4-
Toss r or ■i 〃-n) is provided as H+f function.

The WWA calcium powder prepared next is used as needed to prevent molded products from deforming during extrusion processing, etc., and to keep the unit price of molded products low since calcium carbonate itself is particularly cheap. It is what was done.

In addition to these materials, a separate stabilizer such as lead was prepared in an attempt to prevent deterioration in molded products and to reduce as much as possible the frictional resistance that occurs during extrusion processing. .

Furthermore, when the molded product is to be colored, a corresponding coloring agent is prepared. For example, when the molded product is made white, titanium oxide is mixed in.

m×, a sheet material exhibiting the necessary cushioning function is foam molded by mixing an appropriate foaming agent, and in this foam molding, after sheet molding, the sheet material A separate method was planned for reheating and performing secondary foaming through press treatment.

Thus, it is provided. The material is hardened and dried aggregate (1) is 5
415 is incorporated within the resin material within the range of ~40%,
It is formed and provided as a floor sheet material having a predetermined thickness using appropriate means such as calender rolls, injection, or extrusion.

The floor sheet material provided using this visible forming method has the following abrasion resistance and water absorption properties. That is, wear resistance property test frame 1 Load: 1 kg Number of revolutions: 7 Orpm Type of wear wheel: cs -17 Calibrase (mg
/1000 revolutions) Water resistance property JIS K7209 Water absorption test method for plastics at 25°C, 24 hours Water absorption rate (1) is the water absorption rate per unit area Water absorption rate (2) is the ratio of the water absorption amount to the original test piece Therefore, the floor As a material, it promises exceptional wear resistance, and as it has been found to have moderate moisture absorption, it is said to be extremely durable, and it also effectively prevents surface abrasion and staining, creating a beautiful surface finish. It is especially guaranteed that it can be used for a long period of time.

In addition, due to its moderate hygroscopicity, /i on the floor surface,
This effectively prevents the RL phenomenon or the formation of an oily film, and provides a moist feel to the contact surface. In addition, it has the function of gradually dissipating the moisture generated on the underside of the sheet material over a long period of time, and this, together with preventing water leakage from the surface of the sheet material, creates a comfortable floor surface. This is what I did.

In addition, on the walking contact surface, the aggregate (1) is exposed on the surface, which gives a wood-like feel and moderate slip resistance, creating a comfortable floor surface with little slippage when walking. Moreover, due to the visible slip resistance, the slipping of the installed floor sheet material was effectively suppressed, and the sheet material could be used by being installed in a predetermined position without gluing it to the floor surface. It is something.

Furthermore, since the aggregate (1) is exposed on the surface, decorative paints such as printed patterns applied to the surface will effectively adhere to it due to the presence of the aggregate, ensuring long-term use. Even in the case of 1st Lt on the makeup side, h-U+ +1- Odai Tom so starving

[Brief explanation of the drawing]

The attached drawing is an enlarged cross-sectional view of the main part of the floor sheet material, and (1) in the drawing shows the aggregate. Patent applicant Sadao Nishihori Patent attorney Minoru Kuwahara

Claims (3)

[Claims] (1) Dry crushed chips, bulbs, rice husks, and other appropriate cellulose-based materials so that the moisture content of the material is within 15% to induce collapse of the fibrous structure. Then, the force 10 - impregnate the material with urea resin liquid, and then heat the processed material to +00°C.
Dry and crush in a temperature range of ~250'C, P) 16
~P) Forming the neutralized fine and hardened aggregate of 17-
1. This neutral fine aggregate is 1! ! A method for forming a wooden floor sheet material, comprising the step of molding the sheet material by adding about 5 to 40% of the amount of man into a vinyl chloride or other resin material. (2) The method for forming a wooden floor sheet material according to claim 1, characterized in that the particle size of the aggregate (+iii) is 100 to 150 mesh, and the water molecule content, f, is within 5%. (3) The method for forming a wooden floor sheet material according to claim 1, wherein the sheet material is formed by foam molding.