JP2574548B2 - Continuous production method of laminated sheet of fiber sheet and rubber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously producing a laminated sheet of a fiber sheet having a fiber surface having a good feeling and a rubber.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a sheet made of a fiber product on one side and a vulcanized rubber on the other side, a solvent-based adhesive is applied to a rubber sheet, dried, and both are bonded and pressed. It was most common to stack them. In particular, in the case of continuously laminating thin sheets, a method has been adopted in which a fiber sheet and a rubber sheet are attached to a large number of rolls with an adhesive while being held.

[0003]

However, the method using these adhesives requires that the fibrous product having remarkable irregularities has a weak adhesive force with a rubber sheet, or requires an adhesive application step and a solvent drying step. In addition, it has drawbacks such as entailing environmental problems for dispersing the solvent indoors and outdoors.

In recent years, methods that do not use such an adhesive are disclosed in, for example, JP-A-60-224524 and JP-A-60-1985.
As seen in -224525, a method of laminating by heating a plastic uncured rubber cut to a certain size and a carpet while applying pressure has been adopted. However, this method is low in productivity, labor-intensive, high in cost, and industrially disadvantageous because it is formed by pressing one by one.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies on a method for continuously producing a fiber sheet rubber laminate without using an adhesive in order to solve the above-mentioned drawbacks. Thin, thick and hard-to-bend materials can be obtained by using a pair of opposed metal infinite belt devices that can obtain a laminated product as a flat plate and take sufficient temperature and time to vulcanize rubber. The inventors have invented a method of continuously manufacturing a rubber laminated sheet having a fiber surface having a good feeling by laminating a sheet and an unvulcanized rubber sheet.

That is, the present invention relates to a method for continuously producing a rubber-based sheet while sandwiching an unvulcanized rubber sheet between a pair of metal endless belts running opposite to each other, and heating and pressurizing the sheet. After the fiber sheet and the unvulcanized rubber sheet are stacked and inserted into the holding portion of the belt, the fiber side belt is kept at room temperature to 80 ° C and the rubber side belt is kept at 120 ° C to 200 ° C. , 15 between facing belts
A continuous production method of a textile rubber laminate characterized by heating under pressure while applying a pressure of not more than kg / cm ² .

Here, the pair of metal endless belts is a pair of pulleys having a diameter of 1000 to 2000 mm and a length of 200 to 2000 mm, and a width of 200 to 2000 m.
m, a device formed by tensioning a ring-shaped metal belt having a thickness of about 0.5 to 2 mm and facing two devices,
The pulleys are rotated at the same number of revolutions, and the opposite belt surfaces are run in the same direction. The center distance between two pulleys with a ring-shaped infinite metal belt is 5 m
~ 100m, belt speed is 1 ~ 30m / min, but depending on the type of fiber sheet rubber laminate to be manufactured, especially the thickness of rubber, vulcanization time determined by the difference of compounding chemicals,
The running speed and the center distance of the belt are set. Here, the fiber side belt and the rubber side belt may be arranged in any of the vertical and horizontal positions, but it is preferable to arrange the rubber side belt having a high temperature at the upper part.

The pair of infinite metal belts facing each other has the same size in the upper and lower directions.
It does not have to be the size. For example, the lower belt is wider,
The longer the distance between cores is several hundred mm, the smoother the handling of products and raw materials
In some cases. Also left a pair of infinite metal belts
It may be placed on the right.

As the material of the metal belt, iron, copper, or a plated product thereof, stainless steel, or the like is used, and the surface may be smooth or a pattern may be engraved.

As a method of controlling the temperature of the metal belt,
A method of injecting or casting temperature-controlled air, steam, water, mineral oil, synthetic heat transfer oil, etc. on the back of the belt and then collecting by suction, electric heater, infrared heater, far infrared heater and metal belt surface temperature sensor And a heating control method by a combination of the above.

It is preferable that a receiving roll or a pinch roll is provided near the outlet of the holding section, and the completed laminated product is released from the belt.

Next, as one of the features of the present invention, it is necessary to control the temperature range of the belt. That is, the fiber side belt is
It is necessary to keep the temperature between normal temperature and 80 ° C. The reason is that the belt temperature is 80 ° C. or more for polyethylene terephthalate fiber, and 85 to 85 for 66 nylon fiber.
This is because plasticization starts at 90 ° C. or more and acrylic fiber 90 ° C. or more, and the feeling decreases. If the fiber side belt is cooled too much, heat is taken from the unvulcanized rubber sheet side and the vulcanization reaction does not proceed. Further, the rubber side belt requires a temperature required to complete the vulcanization reaction of the unvulcanized rubber compounded in a usual manner, that is, about 100 ° C. to 180 ° C., and therefore, the rubber side belt has a temperature of 120 ° C. to 200 ° C. It is necessary to keep it at about ° C.

[0013] The fiber product sheet and the unvulcanized rubber sheet are stacked.
The layering pressure is preferably about ^{2 to} 6 kg / cm ² pressure.
There are, however, 0.1 to 15
It can be in the range of kg / cm ² .

The fiber product sheet may be any fiber product such as carpet fabric, knitted fabric, shaggy pile fabric, canvas fabric, calico fabric, non-woven fabric, etc. The technology of the present invention can be used for carpet, knitted fabric, shaggy fabric, etc. This is the case for fabrics such as piles where soft texture is valued.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the construction of a method for producing a fiber sheet / rubber laminate of the present invention will be described in detail below. Embodiment 1 FIG. 1 shows a first embodiment of the present invention. 1200m diameter
drive pulley 1 having a body length of 600 mm and a thickness of 1.2
The belt 5 was held by a tension pulley 2 for applying tension to a rubber side stainless steel endless belt 5 having a width of 500 mm and a width of 500 mm, and the center distance between the pulleys 1 and 2 was set to 5 m. Below these, a device comprising a driving pulley 3, a tension pulley 4, and a fiber side stainless steel belt 6 of the same size is installed. Here, the gaps between the driving pulleys 1 and 3 and the tension pulleys 2 and 4 including the thicknesses of the stainless steel belts 5 and 6 can be freely changed between about 0.5 to 20 mm so as to cope with laminated products having various thicknesses. To hold.

[0016] Next diameter 180 mm, pressurizing roll 7 a five length 600 mm, placed inside the top of the rubber side belt, fitted with a hydraulic cylinder pressure device 8 at each end of the shaft of each roll 7, respectively up to 15 Pressure was applied to be not more than kg / cm ² . On the other hand, five support rolls 9 are mounted directly below the pressure roll 7 inside the fiber side belt 6 to support the pressure from above, and keep the belts 5 and 6 horizontal.
In addition, six electric heating devices with reflectors 10 were mounted between the pressure rolls 7, and the rubber side belt 5 was heated to 160 ° C. On the other hand, a water injector 12 is attached between the support rolls 9, and a water injection nozzle 11 is attached inside the fiber side belt 6.
The belt 6 was cooled by spraying water at a temperature equal to or lower than 0 ° C. Reference numeral 11 denotes a heat ray reflection or heat retention device, and reference numeral 13 denotes a cooling water recovery tray.

After assembling the continuous production apparatus for a laminated product according to the present invention in this way, it is blended by a conventional method to have a thickness of 3 mm and a width of 4 mm.
Unvulcanized rubber sheet 15 formed into a 00 mm long sheet
And the back side of a long 66-nylon brushed tufted carpet 16 not subjected to the same size backing treatment as shown in FIG. It was inserted between the metal belts 5 and 6 and processed at a running speed of 0.1 to 1 m / min to continuously produce the carpet / rubber laminated sheet 17 of the present invention.
The temperature of the metal belt was measured with a contact surface thermometer.
Thus, a carpet product having a good feeling was obtained using the vulcanized rubber sheet of the present invention as shown in FIG. 3 as a backing material.

Example 2 In Example 1, the pressure was changed from room temperature to 80 ° C. and the gauge pressure was changed from 0.1 kg / cm ^{2 to} 15 kg / cm ^{2 in place of} the pressure roll, the support roll, and the heating device. A low-temperature hydraulic device 18 containing a controlled heat medium oil is installed, and pressure is applied to the belt in contact with the back side of the fiber side belt.
A high-temperature hydraulic device 19 containing a heating medium oil controlled at a temperature of 200 ° C. or less and a gauge pressure of 0.1 kg / cm ^{2 to} 6 kg / cm ² is brought into contact with the back side of the rubber side belt to apply pressure to the belt and pressurize the belt. Heat. At this time, the liquid seals 24 are attached to the belt contact sides of the two hydraulic devices 18 and 19 so that the heat medium does not substantially leak. The two hydraulic devices 15, 18 and 19 apply the same pressure and heat under pressure. After assembling the apparatus for manufacturing a laminated product of the present invention in this manner, the back side of an unvulcanized rubber sheet and a long 66 nylon brushed tufted carpet that has not been subjected to a backing treatment as in Example 1 is the unvulcanized rubber sheet. It was stacked so as to be in contact with the rubber sheet, inserted between the metal belts 5 and 6, and continuously heated and pressed at 0.4 m / min to obtain a laminate of the fiber sheet and rubber of the present invention.

(Experimental Example) (Blending raw material) (parts by weight) Natural rubber 100 Sulfur 2 Vulcanization accelerator (N-cyclohexyl-2-benzothiazolyl sulfenamide) 1.5 Vulcanization accelerator (tetramethylthiuram disulfide) 0 .1 zinc oxide 5 stearic acid 1 carbon black (FEF) 40 light calcium carbonate 40 white gloss flower CC (fine activated calcium carbonate) 40  229.6 The above mixture was kneaded with a Banbury mixer and then calendered.
3mm thick and 400mm wide
Using the apparatus of FIG. 4 of Example 2
Manufactured. Table 1 shows the manufacturing conditions and the thickness of the laminated product without compression.
Now, I showed the feeling (tactile sensation with my palm). Fiber side temperature
If it was high, the carpet hairs were severe and the texture was worse.

[0020]

[Table 1]

According to this experimental example, the rubber side belt was heated to the usual rubber vulcanization temperature, the fiber side belt was kept at 80 ° C. or less, and the pressure was 15 kg / cm ² or less (4 to 15 kg / cm ² ).
² ) Good (O) to satisfactory of the present invention by adding
(△) A fiber sheet / rubber laminate can be obtained.
Incidentally, the size and the belt speed of the apparatus of the present invention are not limited to those in the above-described embodiment, but can be enlarged or reduced.

[0022]

According to the method and apparatus of the present invention as described above, it is possible to continuously produce a fiber product / rubber laminated sheet, and the productivity can be greatly improved and the cost can be reduced. . Further, since the product of the present invention is a laminated sheet of a long fiber product and rubber, it can be used by sewing it on a tent or various large-sized covers, especially when the fiber product is a carpet. Construction is streamlined. Since the fiber side is molded at a low temperature, there is no settling of the fiber and a good feeling is maintained, so that a high-quality laminate can be manufactured. Furthermore, since the vulcanized rubber sheet is laminated, the durability is high, and the carpet rubber laminate is richer in flexibility than the latex backing carpet, etc. It has the benefits.

Also, as compared with a laminate using an adhesive, it overcomes many disadvantages such as curing of a fiber product by the adhesive, generation of dirt, influence on the environment due to evaporation of a solvent, and an increase in the number of bonding steps. I was able to.

Since the carpet / rubber laminate manufactured by the method of the present invention is a long sheet, if it is used on the floor as it is, it can be applied to a large area at one time, and has a beautiful appearance. It can also be cut into squares and used as a tile carpet.When used as a carpet for automobiles, cut it according to the shape of the room and sew the surroundings as needed, or hang it with a thread to design It can be used with increased effect. Further, there is a great industrial advantage that it can be used as it is or as an inlet dust-removing mat in which a fiber is impregnated with a bactericide or a dust adsorbent.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a view showing an unbacked fiber sheet (a carpet as an example).

FIG. 3 is a view showing a fiber sheet / rubber laminate of the present invention.

FIG. 4 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive pulley 2 tension pulley 3 drive pulley 4 tension pulley 5 fiber-side metal endless belt 6 rubber-side metal endless belt 7 pressure roll 8 pressure device 9 support roll 10 heating device 11 heat ray reflection or heat retention device 12 cooling water injection Apparatus 13 Cooling water recovery tray 14 Product take-off roll 15 Unvulcanized rubber sheet 16 Fiber sheet 17 Laminated product sheet 17A Vulcanized rubber sheet 18 Low-temperature hydraulic device 19 High-temperature hydraulic device 20 Heat-pressurized liquid oil inlet 21 Heat-press Liquid outlet 22 Cooling pressurized liquid inlet 23 Cooling pressurized liquid outlet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B32B 31/20 7148-4F B32B 31/20 // B29K 21:00 105: 06 B29L 9:00 ( 56) References JP-A-2-113923 (JP, A) JP-A-61-193829 (JP, A) JP-A-60-224525 (JP, A) JP-A-4-278351 (JP, A) Sho 60-224524 (JP, A) JP-A Sho 54-30269 (JP, A)

Claims (1)

(57) [Claims] 1. A method for producing a rubber-based sheet, wherein an unvulcanized rubber-based sheet is sandwiched between a pair of metal endless belts running opposite to each other and heated and pressed to form a fiber sheet and an unvulcanized rubber. After stacking the sheet and inserting it into the holding portion of the belt,
While maintaining the fiber side belt at room temperature or higher and 80 ° C. or lower, and the rubber side belt at 120 ° C. or higher and 200 ° C. or lower, a pressure of 0.1 kg / cm ^{2 to} 15 kg / cm ² is applied between facing belts. A method for producing a rubber laminate of textile products, characterized by heating under pressure.