JPS58183254A - Manufacture of durable floor material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for manufacturing durable flooring materials for use under particularly harsh conditions, such as factory floors.

Conventionally, a transparent polyvinyl chloride (PVC) layer on the surface of a flooring material has been crosslinked to improve the smoke resistance of the flooring material, protect the surface, and maintain fashionability.

However, conventional tobacco-resistant natural flooring materials only provide a light level of durability suitable for use in stores, etc., and the emphasis has been placed on fashionability.

However, in locations such as factory floors where even more severe heat resistance, solvent resistance, and chemical resistance are required, the crosslinking density of the surface layer must be further increased.

Normally, a larger amount of crosslinking agent is added to the PvC paste 4 for this purpose, but thermal stability may be lost and discoloration may occur during heat crosslinking, discoloration due to ultraviolet rays or visible light, and weather resistance may decrease. In addition, whitening due to water absorption was unavoidable due to the inclusion of a crosslinking agent. Such a phenomenon has been a cause of a significant decrease in the commercial value of fashion flooring materials having a transparent surface layer.

With the goal.

According to the present invention, the surface layer is heat-crosslinked by adding more crosslinking agent and pigment to the PVC paste than in the conventional floor material surface layer, thereby making it possible to hide the color change of the crosslinked resin. In the PVC crosslinking method of the present invention, thermal crosslinking of the PVC paste achieved crosslinking in the shortest time and with a high density. On the other hand, thermal crosslinking using the calendar method has a low crosslinking density, other crosslinking methods such as ultraviolet irradiation are not suitable for opaque cases, and electron beam irradiation requires large-scale equipment investment, all of which are unfavorable. .

Another object of the present invention is to obtain a flooring material having a crosslinked surface layer and a dimensionally stable base fabric with high efficiency using a simple device.

The present invention involves pressing and laminating a laminated sheet consisting of an opaque polyvinyl chloride paste resin layer colored with a pigment and a non-crosslinked resin layer and a dimensionally stable base fabric through an extruded resin layer using the residual heat of the extruded resin layer. The gist is a method for manufacturing durable flooring materials characterized by:

The present invention will be explained below based on the drawings. FIG. 1 shows the manufacturing method of the present invention. 1 is a crosslinked PVC paste resin layer, and 2 is a non-crosslinked resin layer. Cross-linked PVC paste resin layer 1 and non-cross-linked resin layer 2 are firmly adhered and laminated/-
3. Cross-linked pvc paste resin pigeon 1 is PV
30 to 10 parts of plasticizer per 100 parts by weight of C paste resin
Add 0 parts by weight and further color with pigments, add 05 to 5 parts by weight of dimercaptothiadiazole, dithiol-S-) riazine derivatives, etc. as crosslinking agents, and other crosslinking aids of strong basic amines, heat stabilizers, etc. 160-25
Heat at 0''C for 2 to 5 minutes.As will be described later in the examples, the obtained crosslinked resin layer has a swelling method compared to transparent crosslinked 1?VC resin, which has been conventionally used as a flooring surface layer. The crosslinking is carried out to a degree that the crosslinking density is high according to tests such as the Curelastometer method and the like.The pigment is added in such an amount that it colors the PVC paste layer and hides the base layer.

The non-crosslinked resin layer 2 is formed of a synthetic resin such as PVC, and both the crosslinked resin layer 1 and the extruded resin layer 4 described below must have good adhesiveness.

The non-crosslinked resin layer 2 can be obtained, for example, by pregelling the non-crosslinked PVC paste 1 or by calendering PVC. The above-mentioned crosslinkable PVC paste solution is applied onto the obtained non-crosslinked resin layer and crosslinked by heating. In this way, the laminated sheet 8 is obtained. The laminated sheet 3 must have sufficient flexibility. The crosslinked resin layer 1 of the obtained laminated sheet 8 has high durability in terms of heat resistance and solvent resistance.

The highly crosslinked layer l is colored with a pigment with hiding power and is opaque, so even if the crosslinking density is increased above the transparent surface layer of the conventional tobacco-resistant PVC crosslinked flooring material, discoloration due to heating is observed. First, it provides a desirable appearance as a flooring material, does not cause whitening even when moisture is attached, and is not affected by the color of the base of the non-crosslinked layer 2. and non-crosslinked resin layer 2
The crosslinked resin layer 1 and the extruded resin layer 4 are firmly bonded together.

When the obtained laminated layer 7-8 passes through the pressure roll 7, the extruded resin layer 4 extruded from the extruder 5 is pressed against the extruded rice fat layer 4 by residual heat while the extruded resin layer 4 is not cooled. The extruded resin layer 4 contains 100 parts by weight of a synthetic resin such as PVC and 200 to 500 parts by weight of a filler such as calcium carbonate, talc, chalk, etc., and is extruded at 160 to 190°C to an arbitrary thickness, usually 045 to B113. ．． It is uniformly formed.

While the extruded resin layer 4 is not cooled, the dimensional stability base fabric 6 is also compressed by the pressure roll 7' due to residual heat.
are crimped almost simultaneously.

Dimensionally stable base fabrics used in the present invention include glass woven fabrics, glass nonwoven fabrics, glass nets, linen fabrics, polyester fabrics, blended fabrics thereof, cheesecloth, and laminates of the above fabrics and thermoplastic resin films such as polyester. etc. are appropriate.

FIG. 2 is a sectional view of the flooring material of the present invention. 8.8' is a PVC paste crosslinked resin layer, 2 is a non-crosslinked resin layer, 4 is an extruded resin layer, and 6 is a dimensionally stable base fabric. (Cross-linked PVC paste colored with different pigments) 11. Using a screen printing device etc., print the paste to a constant thickness of 0.8 to 1.5 mm, and heat the paste at 150 to 250°C. Heat crosslinking is performed for 2 to 5 minutes. The crosslinked resin layer has a pattern of different colors8.
In addition to the plain flooring material 8' obtained, it is also possible to obtain durable flooring materials with a relatively thick patterned layer.

The cross-linked resin layer of the present invention is 50% of that of conventional tobacco-resistant natural flooring materials.
It is desirable to have a crosslinking density of the following two.
When VC paste resin is heated and crosslinked to this extent, thermal discoloration will inevitably occur, but if it is colored with pigments and made opaque, the discoloration caused by heating will be hidden, and unlike conventional tobacco-resistant flooring materials, whitening due to water absorption will not occur. do not have. Furthermore, the colored crosslinked resin of the present application has good heat resistance, solvent resistance, and chemical resistance, and exhibits excellent durability.

The non-crosslinked portion of the surface layer is in close contact with the crosslinked resin layer, and the non-crosslinked layer blends well with the extruded layer when the surface layer and extruded resin layer are bonded together by thermocompression. to strengthen the adhesion.

7. The extruded layer can be formed by bonding the surface layer and the dimensionally stable base fabric simultaneously by thermocompression bonding, and the flooring material of the present invention can be laminated with high efficiency without the need for any other adhesive or the like. With the extrusion method, it is possible to adjust the desired thickness in one go, whereas with the calender method, there is a limit to the thickness that can be obtained. In addition, resin processing using the extrusion method allows the addition of a large amount of filler, which not only allows the product to be supplied at a low price, but also increases thermal conductivity, which can contribute to improving the heat resistance of the floor material surface.

Regarding the dimensionally stable base fabric, it is important to ensure the safety of the floor surface in places where accidents may occur during daily work such as factory floors, so the stable base fabric is used in the present invention. This eliminates the problems of flooring, blistering, and curling up, increasing the safety of factory floors.

With the above-described configuration, the present application can efficiently manufacture a high-performance, durable flooring material that cannot be obtained by conventional methods of manufacturing flooring materials.

Examples are shown below.

Example 1 Non-crosslinked PvC paste was applied to a peeling sort to a thickness of 0.2 mm, brigelized at 120°C, and then PVC to o
60 parts by weight of plasticizer, 2.5-dimercapto-
A PVC paste containing 2 parts by weight of 1,8,4 thiadiazol, 71 parts by weight of 18-diazabicyclo(5,4,0)-undecene, and an appropriate amount of pigment was applied to a thickness of 0.5 mm and heated at 220°C. The resulting laminated sheet was heat-crosslinked for 2 minutes and peeled off from the release sheet. This laminated sheet has pvC1
300 parts by weight of calcium carbonate was blended with 300 parts by weight of calcium carbonate, and the laminated sheet was mixed with polyester and hemp mixed fabric through an extruded resin layer with a thickness of 21 IJ, which was cross-extruded at 180°C. At the same time, due to residual heat from the pressure roll,
The durable flooring material of the present invention was obtained by pressure bonding.

Table 1 shows a comparison between the crosslinked resin layer of the obtained flooring material and the surface layer of a conventional tobacco-resistant natural flooring material.

Table 1 Example 1 Floor material surface layer Volume change in conventional crosslinked floor material surface layer solvent 36 491 (
Note 1) (cj)) i (Note 1) Indicates the volume 15 minutes after sample Icr& was immersed in 2CI'C menal ethyl gas.

(l'I:2) 11μ, which is calculated by dividing the value of the crosslinking torque of the surface layer of the raw material of Example 1 by the curelastometer method by the value of the surface layer of the conventional floor material under the same conditions.
Example 2 Using the crosslinking agent-containing PVC paste described in Example IK as an ink, patterns in several colors were printed on the non-crosslinked PVC paste pregel layer using a screen printing machine, and heat crosslinking was performed at about 220°C for about 3 minutes. A laminated sheet was obtained.

The obtained laminated sheet was pressed onto the extruded resin layer at the same time as the .iθ, stable base fabric as in Example 1.

In Examples 1 and 2, the high crosslink density resulted in superior weather resistance, heat resistance, and solvent resistance compared to conventional tobacco fire-resistant flooring materials, and water absorption and whitening did not occur when rainwater was brought in or cleaned.

[Brief explanation of the drawing]

FIG. 1 is a process diagram of the present invention, and FIG. 2 is a flooring material obtained by the present invention. l is a cross-linked pvC paste resin layer,
2 is a non-crosslinked resin layer, 4 is an extruded resin layer, and 6 is a dimensionally stable base fabric. Patent applicant: Toyo Linoleum Co., Ltd. Procedural Amendment (
(Spontaneous) l Indication of the case Patent Application No. 66075 of 1982 2 Name of the invention Durable flooring material 3 Person making the amendment Relationship to the case Patent applicant. 4. No date for amendment order! 5. Contents of amendment 1 in the column "Detailed Description of the Invention" in the specification to be amended, 2nd line from the bottom of page 4 of the specification, ``Release sheet (not shown)'' between ``Non-crosslinked resin layer 2'' and 1, for example. ) above. 2. "Highly crosslinked layer" on page 5, line 7 of the specification is corrected to "crosslinked resin layer." 8. Insert "Peel from the release sheet" between "Laminated sheet 3" and "1 pressure roll" on page 5, line 16 of the specification. that's all

Claims (1)

[Claims] l A laminated sheet consisting of an opaque thermally crosslinked polyvinyl chloride paste resin layer colored with a pigment and a non-crosslinked resin layer and a dimensionally stable base fabric are bonded to the extruded resin via an extruded resin layer. A method for producing durable flooring material characterized by laminating the layers by pressure bonding using residual heat. 2. The method for producing a durable flooring material according to claim 1, wherein the crosslinked paste resin layer is colored with different pigments and formed into a pattern.