JPS60255843A - Vinyl tile - Google Patents

Abstract

PURPOSE:To provide a vinyl tile having excellent elasticity, strength and processability, by blending zoeolite and CaCO2 with PVC and molding the mixture. CONSTITUTION:5-160pts.wt. zeolite having particle size of 80 mesh or below and a specific surface area of 280m<2>/g or above as measured by the BET method and 4-440pts.wt. CaCO2 treated with resin acid (e.g. diterpene acid), having a particle size of 0.02-350mum as filler, and optionally 15-55pts.wt. primary plasticizer (e.g. 2-ethylhexyl phthalate), stabilizer, colorant, etc. are blended with 100pts.wt. PVC. The mixture is kneaded at 100-150 deg.C and passed between calender rolls kept at a required temp. to mold it. EFFECT:A vinyl tile having excellent physical properties can be obtd. without using asbestos or any secondary plasticizer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to vinyl tiles that do not use asbestos as a filler.

(Prior art) Conventionally, vinyl asbestos tiles usually contain a filler of 200 parts by weight or more per 100 parts by weight of polyvinyl chloride III (abbreviated as P/VC), and have good processability, low cost, and small dimensions. It has become popular as a flooring material that satisfies physical properties such as stability. However, since asbestos is designated as a specified chemical substance, it is necessary to prepare the working environment, and if possible, it is desirable to not use it at all.
Research is being conducted on asbestos substitutes.

Furthermore, even if conventional general-purpose fillers for PVC were used, the same level of processability as asbestos could not be obtained.

(Objective of the invention) The present invention does not use asbestos, has good workability,
Aiming to provide an excellent vinyl asbestos tile alternative.

Another object of the present invention is to provide a vinyl tile using a filler that is easily available and relatively inexpensive.

A further object of the present invention is to provide a vinyl tile that does not require the use of any secondary plasticizer.

(Structure of the Invention) The present invention relates to a vinyl tile that does not contain asbestos and is characterized in that polyvinyl chloride contains at least sepiolye Y as a filler.

The PVC used in the present invention may be a homopolymer of vinyl chloride or a fupolymer of vinyl chloride and other moieties such as ethylene, propylene, vinyl acetate, acrylic acid or methacrylic acid or esters thereof.

In addition, small amounts of styrene/butanoene rubber (SBR), nitrile/butanoene rubber (NBR), chlorinated polyethylene, acrylonitrile/butanoene rubber/styrene (AB
S) I (fat etc. can also be blended.

In the present invention, Seviolite is used as at least 1 part of the filler. That is, Seviolite is used as part or all of the filler. Seviolite is a type of hydrous magnesium silicate and has a brickwork structure, and because of its structure, it has many spaces and has hydroxyl groups on its surface, so it has good adsorption properties and is easily compatible with polar solvents and calcium carbonate. It is desirable that Sevioly F has a specific surface area of 280112/g or more as determined by the BET method. Seviolite powder also exhibits fibrous properties. Since the above-mentioned Seviolite exhibits specificity, various applied researches have been conducted, and in the present invention, it has been found that Seviolite is suitable for blending into PvC tiles, and has been completed. Seviolite preferably has a particle size finer than 80 mesh. In the present invention, Seviolite is used in an amount of 5 to 1% per 100 parts (by weight, hereinafter the same) of PVC.
It is desirable to mix 60 parts.

In the present invention, by using Seviolite as a filler, the workability of the tile is improved, for example, it is said to have improved tackiness (easy attachment) to mill rolls and stiffness when forming into a sheet after mill roll mixing. In other words, it has a characteristic that it does not sag when it is peeled off from a mill roll.

In the present invention, other additives such as primary plasticizers, stabilizers, colorants, etc., which are used in conventional PVC flooring materials, may optionally be added. As the primary plasticizer, a known plasticizer such as 2-ethylhexyl 7-talate or butylbenzyl 7-talate is preferably used in an amount of 15 to 55 parts.

As described above, the method for producing tiles of the present invention is to use a blended composition in which PVC is blended with plasticizers, stabilizers, colorants, etc., as well as Seviolite and other fillers as necessary to exhibit the effects of the present invention, such as ribbons. The mixture is mixed using a blender or the like, then heated and kneaded using a Banbury mixer or the like, further kneaded using a mixing roll kept at a predetermined temperature, and then passed through a Karengu roll maintained at a predetermined temperature.

Manufacture thick sheet material. Here, the heating temperature of the mixing rotor calendar roll is appropriately determined depending on the type of PVC used as the raw material and the blending ratio of each component of the raw material, but generally this temperature is often set between 100 and 150°C. . This sheet material has a certain size, for example 3
If it is cut out to a size of 0.3 mm x 3.03 mm, it can be used as a covering material for floors or walls. In the present invention, there is no problem in forming the O(fat composition) into a sheet, then forming it into a pellet, and then forming it into a sheet again using a Karen Gool roll.

Furthermore, in the present invention, by using Seviolite and calcium carbonate treated with a resin acid together as a filler, tile workability and product performance can be significantly improved. It is also possible to omit the use of a secondary plasticizer.

It is preferable to use 4 to 440 parts of calcium carbonate treated with a resin acid (hereinafter abbreviated as "treated carbonate") based on the pvc+oo part. In the above, 0 (fatty acids are, for example, diterpenic acid, abietic acid, neoabietic acid, d
- Resin acids that are free in natural resins such as pimaric acid, benzoic acid, cinnamic acid, or exist as esters or salts, and resin acids obtained by grafting petroleum resins with unsaturated carboxylic acids are the main components. Examples include salts of this resin acid, and those obtained by partially esterifying the resin acid. Examples of the treatment method using a resin acid include a method in which a resin acid solution is added to a concentrated slurry of calcium carbonate while stirring, followed by filtration, drying, and pulverization.

The calcium carbonate used above usually has a particle size of about 0
．． 02-350μ, preferably about 0.02-10μ, more preferably about 0.04-0.2μ.

The vinyl tile of the present invention can be applied not only to ordinary decorative tiles but also to antistatic tiles, oil-resistant tiles, and the like.

(Effects of the Invention) By blending a new sepiolite as a PVC brightening agent, the present invention improves sheet formability such as elasticity and strength during roll processing of vinyl tiles, and tack, etc., without adding asbestos. ” 1 property has been improved. Furthermore, by using Seviolite and resin-acid-treated carbonaceous, both the processability and the physical properties of the tiles became desirable. It was also possible to omit the addition of a secondary plasticizer. (Example) Examples 1 to 6 and Comparative Examples 1 to 2 The vinyl tiles of the present invention were made into a square with a side of 303111 #l and the thickness was Approximately 21, hardness is approximately 0 according to Matsuku Barney dent value
．． 29, tiles were manufactured based on the formulation (heavy V part) in table 1 of piles. The workability of the obtained tile was determined by J I
S 85705 and FS 1. F-001641 (GS
Measured based on the 8-FSS) standard. Comparative Example 1 is a conventional vinyl asbestos formulation. Examples 1 to 6 generally showed good workability, but in Comparative Example 2, in which asbestos was only removed, the workability deteriorated considerably.

In the tI%1 table, the processability of the mill rolls was evaluated in five stages using a sensory test. A rating of 4 or higher is desirable A):
Tackiness to mill rolls (R): Elasticity in a state that is said to be "normally stiff" when formed into a sheet after mixing with mill rolls, and processability for Examples 5 to 6 and Comparative Examples 1 to 2. The physical properties of the products excluded are shown in the tJS2 table, but Examples 5 to 6
showed performance equivalent to or better than Comparative Example 1, but
In Comparative Example 2, the performance deteriorated significantly. As described above, in the present invention, a vinyl tile with excellent workability and tile performance was obtained.

Claims (2)

[Claims] (1) A vinyl tile characterized by containing asbestos-free and at least Seviolite in polyvinyl chloride as a filler. (2) Claim 1 in which calcium carbonate treated with a resin acid is contained together with sepiolite as a light shaving.
Vinyl tiles as described in section.