JPS58208016A - Manufacture of tile made of synthetic resin - Google Patents

Abstract

PURPOSE:To strengthen the paste directed for calender roll-forming by using rock wool or wallastonite having specially determined fiber length together with acryl series synthetic resin composed of formability-improving agent instead of asbestos used as reinforcing material for synthetic resin tile. CONSTITUTION:100pts.wt. parts of the synthetic resin chosen from the group of vinyl chloride series polymer, vinyl chloride-vinyl acetate polymer or ethylene- vinyl chloride polymer, 40-55pts.wt. parts of plasticizer, 3-7pts.wt. parts of stabilizer, 15-25pts.wt. parts of rosin denatured resin or petroleum denatured resin, 400-700pts.wt. parts of calcium carbonate, 40-150pts.wt. parts of rock wool with under 700mum fiber length or wallastnite and 4-10pts.wt. parts of acryl series synthetic resin composed of formability-improving agent for vinyl chloride synthetic resin are mixed. After this mixed composition is sufficiently kneaded with mixing by a closed pressurized kneading machine and is made into a sheet by a mixing roll, it is finished at determined thickness by a calendar roll.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for producing synthetic resin tiles using a calendar roll method using synthetic resins such as vinyl chloride IF combination, vinyl chloride-vinyl acetate copolymer, and ethylene-vinyl chloride copolymer. It is related to the conventional calender roll method that uses asbestos, without using asbestos, which is an essential ingredient in the production of vinyl chloride synthetic resin tiles using the conventional calender roll method. The object of the present invention is to provide a method for efficiently obtaining vinyl chloride-based synthetic resin tiles, which have properties comparable to those of the vinyl chloride-based synthetic resin tiles obtained in the above, using a calendar roll method.

Vinyl chloride polymer, vinyl chloride-vinyl acetate copolymer,
The method for manufacturing synthetic resin tiles using ethylene-vinyl chloride copolymer (hereinafter referred to as vinyl chloride polymer) involves mixing a kneaded mixture of a synthetic resin and other additives. A calendar roll method in which the sheet is formed into a sheet using rolls and then finished to a predetermined thickness with a calender roll, and a press molding method in which a mixed composition of synthetic resin and other additives is press-molded to form a sheet-like molded product. There is.

However, in the previous calender roll method, the amount of contaminants added to the calender roll formation is 1-1.
It must have an intensity of tl:<, this, −′
) As a reinforcing material, it has been considered essential to add and mix asbestos with about 1n of vinyl salt. Now that the negative effects of I- have been made clear, this (C)
The production of polyvinyl synthetic resin tiles using the calender roll horn method using asbestos not only poses various problems in terms of pollution and health management of operators, but also produces asbestos itself. With the depletion of resources, prices tend to rise, and when product prices soar,
・Ru.

In addition, the latter press molding method requires specific physical properties for the mixed composition in the molding stage, so the 11 types of calender rolls require certain physical properties.
Since it is possible to perform molding without using asbestos, which is considered to be deficient, there are no disadvantages as mentioned above associated with the use of asbestos (although the molding speed is slower than the former calender roll method). It is extremely slow and has problems in terms of production efficiency.

By adopting the structure described in the claims of the present invention, fat-11'I can be used as an essential component in the production of vinyl chloride synthetic resin tiles using the conventional calender roll 11 system. The properties are in no way inferior to those of vinyl chloride synthetic resin tiles obtained by conventional molding without using asbestos.
A-free vinyl chloride synthetic resin tiles can be obtained using the highly efficient calender roll method JJ'
r. J, which eliminates all the drawbacks of the conventional method for producing tiles made of vinyl salt-based synthetic resin.

Hereinafter, the structure + and Q of the method for producing a vinyl chloride synthetic resin tile of the present invention will be explained. 1, +: The method for producing a vinyl chloride synthetic resin tile of the invention Synthetic resin 1 selected from vinyl acetate combination or ethylene-vinyl chloride JF combination
00Φ:I: part and plastic i'jll'I O~3 5
1 part of rosin-modified resin or petroleum-modified resin/S~λ, daΦ゛kibe, carbonic power/L sium qθθ・~70θ central needle part, Fiber length 70
11 qO/l of less than θμ (preferably one with a length of 300μ or more that does not contain non-fibrous materials) or wollastonite 11·qO~/! ;O! ff amount part and salt storage part acrylic synthetic resin q~ which is a processability improver for nil-based synthetic resin
The mixed composition with the 70-mold broken part was well kneaded using a closed pressure kneader, and the resulting kneaded product was mixed with a mixing roll for 70 minutes.
After forming into a sheet, it is finished to a specified thickness using calender rolls, and instead of asbestos used as a reinforcing material, rock wool or wollastonite with a fiber length of 2Sθμ or less and vinyl chloride resin are used. By using the acrylic synthetic resin as a modifier, the kneaded material subjected to calender roll molding is provided with the strength required for the kneaded material.

Next, each component added to the vinyl chloride polymer in the method for manufacturing a vinyl chloride synthetic resin tile of the present invention will be explained.

fll aT plasticizer Primarily phthalic acid plasticizers are used.

If the amount of plasticizer used per 700 parts by weight of vinyl chloride polymer is less than θ.

j II The resulting synthetic resin tile will be inflexible and too hard. If the amount exceeds 55 parts by weight, the resulting synthetic resin tile will become too soft. It is added within a range of % by weight.

(21 Stabilizers Of course, stabilizers for vinyl chloride yarn polymers are used, but fatty acid carboxylic acid metal soaps and organometallic compounds are mainly used. Vinyl chloride polymers 10
If the amount of stabilizer used per 0 parts by weight is less than 3 parts by weight,
The effect of mixing the stabilizer is small, and if it exceeds 7 parts by weight, the effect of increasing the amount of stabilizer will not be as good as that ratio, so the stabilizer should be in the range of 3 to 7% by weight of the vinyl chloride polymer. Added within.

(3) Rosin-modified resin, petroleum-modified resin, gin-modified resin, or petroleum-modified resin are used to create a mixture of vinyl chloride polymer and other additives when mixed with a mixing roll. This product develops stickiness and facilitates sorting using mixing rolls.Rosin, which is extracted from pine tar and tall oil, is esterified or rhino-ized, and metal salts are added depending on the application. A rosin-modified resin is used, or similarly, a petroleum-modified resin obtained by esterifying or liming a petroleum resin and further adding a metal salt or the like as necessary. If the amount of rosin-modified resin or petroleum-modified resin used is less than 75 parts by weight based on 700 parts by weight of the vinyl chloride polymer, the kneaded product will not have sufficient tackiness, and the effect of adding the rosin-modified resin or petroleum-modified resin will decrease. I can't get 25 again.
If it exceeds the weighing section, the stickiness of the mixed material will become too large, and the mixed material will stick to the roll when it is formed into sheets using a mixing roll, and the sheet forming process will not proceed smoothly. Resin or petroleum modified resin is 15~a2 of vinyl chloride polymer! ; +(f ii%
It is added within the range of

(1) Calcium carbonate is added as a waxing agent, but when vinyl chloride polymer/00 ffi contains more than 700 parts of calcium carbonate, ,? :j
PVC-based synthetic resin tiles become brittle, so
It is necessary to keep it below 7θθ. In addition, if the addition of calcium carbonate is less than 1-1, the addition of calcium carbonate will be less than 1-min. Calcium carbonate is 1 liter of vinyl chloride-based 1F combined
It is added within the range of oo to 700% by weight. .

(5) Rock wool or wollastonite Both rock wool and wollastonite are used together with acrylic synthetic resin, which is a processability improver for synthetic resins made from vinyl chloride polymers, to be described later, to form sheets using mixing rolls. It gives the kneaded material in the oxidation process the strength required for the kneaded material, and in the case of rock wool, the fiber length is 70.
A material of 0μ or less can be used, but a material of 300μ or less that does not contain non-fibrous materials is particularly preferable.Furthermore, those that have been surface-treated with a surface treatment agent such as a coupling agent have a fluidity that is in the direction of -1-shield. , the entangling effect of vinyl chloride synthetic resins, fillers, etc. is improved, so better results can be obtained.

In the case of rock wool and wollastonite, if the amount is less than 10 parts by weight relative to 700 parts by weight of the vinyl chloride polymer, not only will the reinforcing effect of the resulting mixed material be insufficient, but also the molded product will not have a sufficient reinforcing effect. The stability of vinyl chloride synthetic resin tiles deteriorates, and if the seam exceeds 15°Φ, the resulting synthetic resin tiles become hard and brittle, so do not use rock wool or wool. Last night is
In any case, llo~/3 of the hinyl chloride thread small coalescence
It is added within the range of 0.

(6) Acrylic synthetic resin as a processability improver for vinyl chloride resins Commercially available acrylic resins can be used as they are as processability improvers for vinyl chloride resins3.
, in combination with the aforementioned rock wool or wollastonite with a fiber length of 7 ooμ or less, by Migi/Nogrol/-
This process imparts the required strength to the kneaded material in the toning process, and the gelation of the vinyl chloride synthetic resin is achieved by adding acrylic synthetic resin, which is a processability improver for the vinyl chloride synthetic resin. is accelerated, and a bonding effect with the carbonic acid, which is added as an additive, is expressed7.Additionally, the addition of this alkali-based synthetic resin
It also has the effect of improving the shape retention of the vinyl chloride-based synthetic resin tiles obtained, and also acts as a physical property improver of the obtained molded product.

If the acrylic synthetic resin, which is a processability improver for vinyl chloride synthetic resin, is less than 700 parts by weight of the vinyl chloride polymer, the above-mentioned effect will not be 1 minute, and
If the amount exceeds 0 parts by weight, the effect will not be improved and the ratio of increase in the amount added will become uneconomical.
It is added within the range of 70% by weight. .

・)1 Hereinafter, the specific structure of the method for producing a vinyl chloride-based synthetic resin tile of the present invention will be explained with reference to Examples, and the results of measuring the physical properties of the obtained synthetic resin tile will be described below.

Example/~q The blended composition shown in the Example/~q column in Table 1 below was well kneaded for 2 minutes in a Hufbury mixer, and heated to /O~/70'O by frictional heat. Obtain the kneaded material3. 4HI's mixed wires are mixed with Mikin/Groll/θS~/
35. . C, and then put it on a calendar roll to form a long vinyl chloride sheet with a thickness of 2 mm.

Plastic tile Hiro+, (b+, (C1, +D+)
was molded.

Comparative example / Comparison example for the first person listed below / Comparison point If shown in the column
b'Z object is operated in exactly the same way as the previous +iL''k flow side, and 1
7 long 2mm long 5-piece ties made of vinyl chloride synthetic resin
t (Ic) was obtained for comparison.

Comparative example! ~3 In Table 1 below, when the formulations 1j7 shown in columns 2 and 3 of Comparative Examples 2 and 3 were operated in exactly the same manner as in 1) IS Example, vinyl chloride-based Because the synthetic resin notebook is brittle and has extremely poor shape retention, it has not been possible to form it into a sheet that can be used as a material for tile-shaped molded objects.

Experiment Long vinyl chloride synthetic resin tiles obtained in the above Examples/- and Comparative Examples (A) to (D), and (E)
were cut into 30mm lengthwise 1g pieces and widthwise 30days 1g pieces, and each of the resulting synthetic resin tiles was: rxs A
-3705 (vinyl floor tile) The quality characteristics of the results of the test are shown in Table 20.

In all of the above examples/~q, the sheet shape retention of the vinyl chloride synthetic resin sheet during the rolling process with calendar rolls was good, and the molding in the conventional comparative example/using asbestos as a reinforcing material was found. It had almost the same rolling performance as that of a vinyl chloride synthetic resin sheet in the process.

In addition, the properties of DJ (vinyl chloride synthetic resin tile body obtained in Example/~ da)~ (DJ) are as follows: It is clear from the above experiment that the properties are comparable to those of tile (E).

Furthermore, in the above examples, vinyl chloride-vinyl acetate copolymer is used as the vinyl chloride-based synthetic resin, but vinyl chloride polymer, ethylene-vinyl chloride copolymer and ethylene-vinyl chloride copolymer are used as the vinyl chloride-based synthetic resin. Alternatively, even when a mixture of these is used, the processing characteristics in the molding process are good, and the properties of the resulting synthetic resin tile are similar to that of the vinyl chloride synthetic resin tile (E) obtained in the comparative example. It has been confirmed that there is no inferiority in comparison.

The method for producing vinyl chloride synthetic resin tiles of the present invention has the above-mentioned structure. We have created vinyl chloride synthetic resin tiles that are comparable in quality to the vinyl chloride synthetic resin tiles obtained by the conventional calender roll method using asbestos, without the use of asbestos.
Obtained using the calender roll method, it is effective in preventing pollution.
The effect is that tiles made of vinyl chloride-based synthetic resin can be obtained with high production efficiency without causing any adverse effects associated with the use of asbestos in terms of health management for operators.
, it is effective.

patent applicant Nitto Boseki Co., Ltd. agent Ichi Kawa Riyoshi (7 other people)

Claims (1)

[Claims] 100'R-ivt portion of seven or more synthetic resins selected from vinyl chloride polymer, vinyl chloride-zenyl acetate co-F polymer, or ethylene-vinyl chloride copolymer, and μ
- 55 parts by weight of plasticizer, 3 to 7 parts by weight of stabilizer, 25 parts by weight of rosin-modified resin or petroleum-modified resin, 00 to 50 parts of carbonate, 3 to 7 parts by weight of stabilizer, long 7
Rock wool or wollastonite 11 below 00μ
A mixed substance consisting of a mixed component of 0~/30tM, fitr, part and an acrylic synthetic resin group~/θ type moving part, which is a processability improver for vinyl chloride synthetic resin, was mixed with a mixing roll.
- It is made into a sheet and then trimmed to a predetermined thickness using a calender roll.
- A method for producing a synthetic resin tile characterized by the ability to