JPH0551466A - Woody molding base material - Google Patents

Abstract

PURPOSE:To obtain the title molding base material useful for interior material etc., having excellent moisture resistance and strength, improved moldability, mold release characteristics, economic efficiency and molding operation efficiency by blending woody fibers with specific amounts of glass fibers and phenol resin and molding into proper thickness. CONSTITUTION:A woody fiber raw material 12a and phenol resin powder 41 are fed to a conveyor roll 25 of a woody fiber supplying means 21 and woody fibers are opened by a thread opening roll 27 to give a mixture 18 of the woody fibers 12 and the phenol resin 41. Glass fibers 13 supplied by a glass fiber feeder 23 and opened by a thread opening roll 37 are sprayed with a phenol resin solution 43, the glass fibers sprayed with the phenol resin solution and the mixture 18 are transported by a conveyor 45, mixed by a thread opening roll 47, fed to a conveyor 51 and needle punched by a needle punch 53 to give the objective woody molding material comprising 80-85wt.% woody fibers, 3-5wt.% glass fibers and 10-15wt.% phenol resin molded into proper thickness.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wood-based molding substrate,
More specifically, it is used for ceiling base materials and other interior base materials, and has wood fibers and glass fibers mixed in the wood fibers, and phenol resin is mixed in the wood fibers and the glass fibers. The present invention relates to a wood-based molding substrate formed to have an appropriate thickness.

[0002]

2. Description of the Related Art Conventionally, a molded ceiling of a vehicle or the like and other interior materials are formed by bonding a skin material to a ceiling base material, an interior base material, or the like. Some of these ceiling base materials and interior base materials are formed by using a wood-based molding base material formed by defibrating wood chips or the like. FIG. 4 shows a conventional wood-based molding base material. This wood-based molding base material 1 is a wood-based molding material formed by adding a binder such as a thermoplastic resin or a thermosetting resin to wood fibers. 2 and reinforcing glass fiber mats 4 and 5 joined to the front and back surfaces of the wooden base material 2 with an adhesive or the like (Japanese Patent Laid-Open No. 2-111503).
Publication). Recently, as disclosed in JP-A-2-22005, a mixture of 5 to 30% by weight of glass fiber added to a wood-based molding material is compression-molded for the purpose of preventing deformation such as sagging. Wood-based compacts have been proposed.

[0003]

In the conventional wood-based molding base material 1, the work of setting the reinforcing glass fiber mats 4 and 5 on the front and back surfaces of the wood base material 2 is complicated and the work efficiency is improved. In addition, since the mats 4 and 5 made of glass fibers are bonded to the entire front and back surfaces of the wood base material 2 in a state where the mats 4 and 5 made of glass fibers are impregnated with phenol resin, the amount of the mats 4 and 5 made of glass fibers increased It had the drawback of increasing costs. Furthermore, the wood base material 2 and the glass fiber mat 4,
When 5 and 5 are set in a hot press molding die and these laminated products are subjected to hot press molding, the phenol resin leaks to the surface side of the mats 4 and 5 of glass fibers and the phenol resin easily adheres to the molding die. The releasability of the wood-based molding substrate 1 was deteriorated.

In the case of a wood-based molding obtained by adding 5 to 30% by weight of glass fibers to a wood-based molding material, the glass fiber is used in a large amount, and a certain number of glass fibers are bundled with a sizing agent. Since it uses so-called chopped strands cut to length, it has the drawback of poor moldability, complicated production of glass fiber, and cost increase. However, it has a drawback that it is not economical. An object of the present invention is to significantly reduce the amount of glass fiber used, to be excellent in moldability, and to be extremely economical, and also to be excellent in mold releasability of a wood-based molding substrate and to improve work efficiency. The present invention provides a wood-based molding substrate having moisture resistance and strength capable of achieving the above.

[0005]

The present invention has been made in view of the above-mentioned problems, and has wood fibers and glass fibers mixed in the wood fibers, and the wood fibers and the glass fibers are phenol resin. In a wood-based molding base material having a proper thickness mixed with 80 to 85% by weight of the wood-based molding base material, 3 to 5% by weight of the glass fiber, and 10 to 10% of a phenol resin. It is characterized by being 15% by weight. Further, in the present invention, the glass fiber has a fiber length of 5 to 5.
It is characterized by being composed of a 20 mm monofilament.

[0006]

According to the present invention, the wood fibers and the glass fibers mixed in the wood fibers are used, and the wood fibers are 80 to 8
5% by weight, the glass fiber is 3 to 5% by weight, and the phenol resin is 10 to 15% by weight, so that the amount of the glass fiber used can be reduced, the moldability can be improved, and the strength can be improved. Sufficiently, also, there is no fear that the phenolic resin mixed in the wooden base material will leak and adhere to the molding die, and it is possible to improve the releasability of the wooden base material.
The work efficiency can be improved. Further, when the glass fiber is formed from a monofilament having a fiber length of 5 to 20 mm, the glass fiber and the wood fiber can be easily and quickly mixed, and since they are uniformly mixed, the strength can be obtained even when the amount of the glass fiber used is small. Can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wood base material according to the present invention will be described in detail below with reference to the drawings. 1 and 2 each show an outline of one embodiment of the present invention. As shown in FIG. 2, the wood-based molding base material 11 includes wood fibers 12 and glass mixed in the wood fibers 12. Fiber 13 and the wood fiber 12
Phenol resin 14 in the mixture 16 of glass fiber 13 and
And the wood fibers 12 and the glass fibers 13 are needled by needle punching. The wood fiber 12 of the wood-based molding substrate 11 is 80 to 85% by weight, and the glass fiber 13 is 3 to 5% by weight.
Further, 10 to 15% by weight of the phenol resin 14 is mixed in the mixture 16 of the glass fiber 13. The weight of the wood-based molding substrate 11 is 1.2 to 1.5 kg / m ² . As an example, in the case of a molded ceiling provided with a garnish at the front and rear and attached to a roof panel, the glass fiber 13 can be 3% by weight, and when the glass fiber 13 is 3% by weight, the wood fiber 12 can be used. Can be 82% by weight and the phenol resin 14 can be 15% by weight. Further, in the case of a molded ceiling that is attached to the roof panel without a garnish provided in the front and rear, the glass fiber
3 is preferably 5% by weight. This glass fiber 13
Is 5% by weight, the wood fiber 12 can be 80% by weight and the phenol resin 14 can be 15% by weight. The wood-based molding base material 11 according to the present embodiment does not have a shape as a final molded product.
1 is molded into a desired shape, or simultaneously with molding, a skin material (not shown) is laminated to form a molded ceiling or other interior material. The wood-based molding substrate 11 is a ceiling substrate and an interior substrate. It is a base material for forming materials and the like.

As shown in FIG. 1, the wood fiber 12 is supplied from the wood fiber supply means 21, and the glass fiber supply means 2 is also provided.
The glass fiber 13 made of monofilament is supplied from No. 3. The wood fiber supply means 21 has a wood fiber raw material 12a.
Wood fiber waste, wood chips, etc. are supplied, and the wood fiber waste, wood chips, etc. have high tensile strength, cedar,
Coniferous trees such as pine and cypress are used, and these wood fiber raw materials 1
2a is supplied to the first conveyor 25. The wood fiber raw material 12a supplied to the first conveyor 25 is conveyed by the first conveyor 25 and is supplied to the first fluff roll 27 arranged at the transfer end of the first conveyor 25. .. The first fiber roll 27 disintegrates the wood fiber raw material 12a into wood fibers 12 having a fiber length of 20 to 40 mm. A first storage part 29 for storing the disentangled wood fiber 12 is formed below the first fluff roll 27. The glass fiber supply means 23 has a fiber length of 5 to 20 mm.
Although the glass fiber 13 composed of the monofilament may be directly supplied, a glass fiber raw material 13a such as glass wool waste may be used. In this case, the second conveyor 35 that conveys the glass fiber raw material 13a such as glass wool waste, and the glass fiber raw material 13a that is conveyed by the second conveyor 35 have a fiber length of 5 to 20.
The second anti-wool roll 37 that disintegrates into mm may be provided.
A second storage portion 39 for storing the disentangled glass fibers 13 is formed below the second fluff roll 37.

On the first conveyor 25 of the wood fiber supply means 21, the phenolic resin powder 41 is added to the wood fiber raw material 12a, and the phenol resin powder 41 is converted into the wood fiber raw material 12a by the first anti-wool roll 27. When the fibers 12 are defibrated, they are mixed into the wood fibers 12, and the mixture 18 of the wood fibers 12 and the phenol resin powder 41 is stored in the first storage portion 29. The phenol resin powder 41 is mixed in 10 to 15% by weight with respect to the wood fiber. Glass fiber 13 composed of monofilament having a fiber length of 5 to 20 mm, or second anti-wool roll 3
When the glass fiber 13 formed by disintegrating the glass fiber raw material 13a by 7 is stored in the second storage portion 39,
The water-soluble phenolic resin 43 is sprayed on the glass fibers 13. The water-soluble phenolic resin 43
Is mixed in an amount of 10 to 15% by weight based on the glass fiber. In addition, in the present embodiment, the case where wood fiber scraps, wood chips, or the like is used as the wood fiber raw material 12a has been described.
It is also possible to use the wood fiber raw material 12a of the virgin material.

The first storage section 29 and the second storage section 39
In the lower part of the wood fiber 12 and phenol resin powder 41
Of the mixture 18 and the supply port 39a of the glass fiber 13 coated with the water-soluble phenolic resin 43 are formed respectively, and the third conveyor 45 is disposed below these supply ports 29a and 39a. ing. A valve mechanism is provided at each of the supply ports 29a and 39a, and the mixture 18
Further, it is possible to provide a predetermined amount of supply means for supplying the glass fiber 13 and the glass fiber 13 in predetermined amounts. The mixture 18 of the wood fiber 12 and the phenolic resin powder 41 dropped onto the third conveyor 45 and the glass fiber 13 coated with the water-soluble phenolic resin 43 are transferred by the third anti-wool roll 47 at the transfer end. Are mixed, and these mixtures 16 form a third
Is supplied to the storage part 49 of the. In place of the third fluff roll 47, the mixture 18 of the wood fiber 12 and the phenol resin powder 41 and the glass fiber 13 coated with the water-soluble phenol resin 43 are mixed in the third storage 49. A stirring member to be obtained may be used.

A supply port 49a for the mixture 11a to be the wood-based molding base material 11 is formed in the lower portion of the third storage portion 49,
A transport conveyor 51 is arranged below the supply port 49a. Incidentally, like the supply ports 29a and 39a, a valve mechanism may be provided at the supply port 49a, and a predetermined amount of supply means for supplying the mixture 11a in predetermined amounts may be provided. The water-soluble phenolic resin 43 of the mixture 11a to be the wood-based molding substrate 11 is the wood fiber 12 and the glass fiber 13
The mixture 16 can be used as a binding agent for directly binding, and the phenol resin powder 41 acts as a binding agent for binding the mixture 16 of the wood fiber 12 and the glass fiber 13 by being melted by heating. Further, the phenolic resin 14 imparts shape retention to the wood-based molding substrate 11. A predetermined amount of the mixture 11a to be the wood-based molding substrate 11 is supplied from the supply port 49a, and the mixture 11a contains 3 to 5% by weight of the glass fiber 13, and the predetermined amount of the mixture 11a is appropriate. Is supplied to the conveyor 51 from the supply port 49a so as to have a thickness of. Needle punch 53 on this conveyor 51
And thus the wood-based molding substrate 11 having an appropriate thickness is formed on the conveyor 51.
The mixture 11a supplied from the supply port 49a may be primarily press-molded by a casing roller and then supplied onto the conveyor 51. The wooden base material 11 is sequentially conveyed from the transfer end of the conveyor 51, sent to the next step, and subjected to hot press molding to finally form a molded ceiling of a vehicle or other interior materials. When the glass wool waste is used, the glass wool is already impregnated with the phenol resin, so that it is not necessary to apply a large amount of the phenol resin again, which is excellent in economic efficiency.

As a result of performing the moisture resistance deformation test of the wood-based molding base material 11 under the following conditions, the wood-based molding base material 11 was significantly less deformed than the wood-based molding base material in which the glass fiber 13 was not mixed. The wood fiber 12 used in the sample was 80% by weight of wood fiber 12 and 5% by weight of glass fiber 13, and the mixture 16 of wood fiber 12 and glass fiber 13 was mixed with 15% by weight of phenol resin 14. did. The size of the sample is 2.5 mm in thickness and 100 × 300 mm, and this sample is clamped in the longitudinal direction by 30 mm, and the temperature is 70 ° C. and the humidity is 95.
% For 4 hours. The moisture-resistant deformation was -50 mm in the case of the wood-based molding base material 11 of the above-mentioned composition, whereas it was -100 mm in the case of the wood-based molding base material in which the glass fiber 13 was not mixed. Thus, the glass fiber 13 has a sufficient strength at 5% by weight or less.

Further, as shown in FIG. 3, a molded ceiling base material 55 is formed from the wood-based molded base material 11 containing 5% by weight of the glass fiber 13 of the above-mentioned embodiment, and the molded ceiling base material 55 is formed.
The thermal cycle test was performed using the. The heat cycle test is performed at a temperature of 90 ° C for 4 hours, a room temperature of 0.5 hours, a temperature of -40 ° C
1.5 hours, temperature 70 ° C, humidity 95%, 3 hours, room temperature 0.
Four cycles of 5 hours were performed. Molded ceiling base material 5
Table 1 shows the deformation amounts corresponding to the position numbers shown in FIG.

[0014]

[Table 1]

[0015]

The constitution of one embodiment of the wood-based molding base material according to the present invention has been described above. According to such constitution, the wood fiber and the glass fiber mixed in the wood fiber are included. 80 to 85% by weight of the wood fiber and 3 to 5 of the glass fiber.
Since the weight% and the phenol resin are 10 to 15% by weight, the amount of the glass fiber used can be reduced, the moldability can be improved, and the strength is sufficiently high. There is no risk of the mixed phenol resin leaking out and adhering to the molding die, it is possible to improve the releasability of the wood-based molding base material, and it is possible to obtain a wood-based molding base material that is extremely economical. .. Further, when the glass fiber is formed from a monofilament having a fiber length of 5 to 20 mm, the glass fiber and the wood fiber can be easily and quickly mixed, and since they are uniformly mixed, the strength can be obtained even when the amount of the glass fiber used is small. It is possible to improve the work efficiency.

[Brief description of drawings]

FIG. 1 is a process drawing showing an outline of a manufacturing process of a wood-based molded substrate of the present invention.

FIG. 2 is a cross-sectional view of a wood-based molding substrate of the present invention.

FIG. 3 is a plan view of a molded ceiling using the wood-based molded substrate of the present invention.

FIG. 4 is a cross-sectional view of a conventional wood-based molding substrate.

[Explanation of symbols]

 11 Wood-Based Molding Base Material 12 Wood Fiber 13 Glass Fiber 14 Phenol Resin 21 Wood Fiber Supply Means 23 Glass Fiber Supply Means 41 Phenol Resin Powder 43 Water-Soluble Phenolic Resin 53 Needle Punch 55 Molded Ceiling

Claims (2)

[Claims] 1. A wood-based molding substrate comprising wood fibers and glass fibers mixed in the wood fibers, wherein a phenol resin is mixed in the wood fibers and the glass fibers to form an appropriate thickness. , Wood fiber of the wood-based molding base is 8
0 to 85% by weight, the glass fiber is 3 to 5% by weight, and the phenol resin is 10 to 15% by weight. 2. The wood-based molding substrate according to claim 1, wherein the glass fiber is a monofilament having a fiber length of 5 to 20 mm.