JPS63256656A - Porous film composition - Google Patents

Abstract

PURPOSE:To provide the title compsn. excellent in deodorizing properties, adsorptivity, germicidal action, purifying properties, etc., by dispersing porous fine particles of dellenite in a crystalline high-molecular material and molding the mixture into a film. CONSTITUTION:Dellenite which is a kind of a rock belonging to rhyolite and composed of about 70% silicon dioxide, about 15% aluminum oxide MgO, K2O, Na2O, CaO, FeO, Fe2O3, TiO, anhydrous titanium oxide, phosphoric anhydride, MnO and adherent moisture is crushed and then ground for 1-24hr to obtain porous fine particles (B) having a diameter of 0.1-100mu, pref. 0.1-20mu. 0.1-5wt.% component B is dispersed in a crystalline high-molecular material (A) (e.g., PE) which is a carrier. The mixture is molten, oriented 1.5-5 times as long and molded into a film or a sheet.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is based on a method in which porous fine particles obtained by grinding maifanite, which is a type of rock belonging to the 2-quartz porphyry, are dispersed in a crystalline polymer serving as a support. The crystalline polymer composition is obtained by forming the crystalline polymer composition into a film. The present invention relates to a membrane composition having effects such as deodorization, adsorption, sterilization, and purification.

(Prior art) Maihan stone is a type of rock belonging to the quartz porphyry family, and has been known since ancient times as a medicinal stone in Chinese medicine. It is an odorless natural ore. Traditionally, due to its efficacy, Maihan stone has been used not only as a medicinal stone but also as a cosmetic additive.

Appropriately crushed rocks have been used to purify drinking water, bath water, and other living water, and as a soil conditioner in gardening. However, since it is a natural ore, its shape is not fixed, and since Maifan stone is used as a single substance, there are restrictions on its uses.

In order to solve these problems, for example, Japanese Patent Application No. 54-1
According to No. 9102, the effects of Maifan stone were utilized by crushing rock and impregnating absorbent fiber materials such as paper and cloth with the colloidal particles, or by spraying the colloidal particles.

Further, according to Japanese Patent Application No. 60-85538, an attempt has been made to form a foam in which multi-elements and porous minerals are mixed with open-cell polyurethane foam.

However, in the impregnating and spraying methods, the adhesion was extremely poor and the maifan stone often fell off, making it impossible to obtain the expected effects.

Due to the nature of cloth, etc., they all have a coarse density, and the paper.

Environmental atmosphere around cloth etc. 2 For example, gas concentration.

Influenced by humidity, there have been cases where wrapped and packaged items have been contaminated by the external environment. In addition, the method of mixing polyurethane foam requires a certain amount of volume, resulting in morphological restrictions and lacks flexibility, which limits the field of use. Additionally, cellular polyurethane foam is paper-like.

It has a coarser density than cloth, etc., and may be highly contaminated by the environmental atmosphere.

(Problems to be Solved by the Present Invention) As mentioned above, in the conventional technology, the deodorizing property of Maifan stone,
In order to sustainably utilize the effects of adsorption, sterilization, purification, etc., it is necessary to take full advantage of these effects, as it is easy for Maifan stone to fall off from paper, cloth, etc. used as a carrier, or be contaminated by the external environment. I couldn't do that. In addition, it has many problems such as lack of adaptability due to its shape.

The purpose of the present invention is to eliminate these drawbacks, maintain the characteristics and effects of Maifanseki for a long time, and further.

It is an object of the present invention to provide a porous membrane composition formed by forming a film of a crystalline polymer containing porous microparticles of Maihanite, which has adaptability to a wide range of applications such as miniaturization, thinning, and flexibility.

(Means for Solving the Problems) As a result of extensive research in order to solve the above problems, the present inventors have found that 1. Maifan stone, which is a type of rock belonging to quartz porphyry, has a thickness of 0.1 to 100μ porous fine particles ground to a diameter,
Discovered that a porous film composition obtained by forming a film from a crystalline polymer composition in which 0.1 to 5% (weight ratio) was dispersed in crystalline molecules serving as a support9 was achieved.9 Achieved the present invention. did.

Maifan stone, which is a type of rock belonging to the quartz porphyry group used in the present invention, mainly contains about 70% silicic anhydride and about 15% aluminum oxide, as well as magnesium oxide, potassium oxide, sodium oxide, and calcium oxide.

It is composed of several percent of each of ferrous oxide, ferric oxide, titanium oxide, titanium anhydride, phosphoric anhydride, manganese oxide, and combined adhering water.

After crushing this maifan stone with a jaw crusher machine.

Furthermore, by grinding in a centrifugal ball mill for 1 to 24 hours, the pores of the maifan stone particles having a diameter in the range of 0.1 to 100 μm are made into fine particles. In order to form a stable film, particles with a diameter of 0.1 to 20 μm are more preferable. Depending on the use of the porous membrane composition, the total amount of both maifanite and crystalline polymer is 100 parts by weight.

Maifan stone porous! Fine particles are dispersed at a rate of 0.1-5%.

Examples of crystalline polymer compounds that serve as carriers for the porous microparticles of Maifanseki include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyhalogens such as polyvinylidene chloride and polyvinylidene fluoride. compounds, polyamides, etc. are used. These crystalline polymer compounds are
Lubricants and surfactants to improve dispersibility as necessary.

A thermal stabilizer and an oxidizing agent are appropriately selected and used by melt-mixing them.

The molten mixture of crystalline polymeric compound containing porous fine particles of Maifanite is extruded into a film or sheet form through a heated die. moreover.

These films or sheets are stretched under tension while maintaining a temperature suitable for stretching, at a stretching ratio of 1.
A range of 5 to 5 times (length/width stretch ratio 1:2 or 2:1) is used. The stretched film or sheet is cooled with water or open air to obtain a porous membrane composition.The porous membrane composition according to the present invention can be made into a tubular shape by changing the shape of the die during melt molding. It is also possible to easily manufacture arbitrary molded products such as plate-like, thread-like, etc.

(Example) Next, the present invention will be described in more detail with reference to Examples.

Example 1 Maifanite porous fine particles (average particle size: 15 μm) were produced by crushing Maifanite with a jaw crusher and then grinding it with a centrifugal ball mill for 12 hours. These Maifan stone porous fine particles are mixed with polyethylene resin with a specific gravity of 0.92 and a specific gravity of 0.92.
．． 89 polypropylene resin each with 2.5
% was prepared, kneaded in a hopper, and charged into an extruder. These mixtures are transported along the extruder grooves, melted, and extruded through screen breaker plates and into dies.

Next, the unstretched film is extruded from a flat film die attached to the tip of the extruder. In the case of polyethylene, this unstretched film is stretched and stretched by a tenter method at a stretching ratio of 1.5 (N transverse stretching ratio 1:1.5), and then rapidly cooled in a water tank to contain porous microparticles of Maifan stone. Produce a polyethylene film, and in the case of polypropylene, stretch it by the tubular method (stretch ratio of about 2.0 and length and width stretch ratio of about 1:1.8) L,
By cooling at room temperature, a polypropylene film containing porous microparticles of Maifanite was produced.

As a comparative example, films made of 100% polyethylene resin and 100% polypropylene resin, which do not contain maifanite, were produced.

Table 1 shows the manufacturing conditions of Examples and Comparative Examples, and Table 2 shows the properties of each film produced.

Note that, regarding the manufacturing conditions, both films containing and not containing porous microparticles of Maifanite were manufactured under the same conditions. Further, the properties of the film were measured by the following measuring method.

(1) Specific gravity: ASTM D1505-637 (2)
Strength: D 882-617 (3) Elongation:
〃D 8B2-617 (4) Bursting strength: Thickness [11 ASTM D 774-63T (5) Tear strength: D1922-61
T(6) Heat resistance: , D759-48th
1 Table 2 As is clear from the values shown in Table 2, the strength properties of both polyethylene and polypropylene films containing porous microparticles of Maifan stone are slightly lower than those of films not containing Maifan stone. Although a decrease is observed, there is no problem in practical use.

Example 2 Using the same process as in Example 1, two types of films containing 1% and 2.5% of Maifanite porous microparticles in polypropylene resin were produced. These polypropylene films containing porous fine particles of Maifan stone and a 100% polypropylene film containing no Maifan stone produced as a comparative example were each coated with a film thickness of 4 fins.

It was cut into 5 strips lengthwise and widthwise, 5×10co+, tied with a nylon 1000 denier string, and hung in the center of a 5000 CI11 airtight container. This container is filled with malodorous gas such as trimethylamine, methyl mercaptan, ammonia, etc. at a fixed concentration, and the gas in the container is taken out at fixed intervals, and the concentration is determined by neutralization titration with acid or alkali depending on the type of test gas. The removal rate of malodorous gas was determined.

The results are shown in Table 3 (trimethylamine), Table 4 (methyl mercaptan), and Table 5 (ammonia gas).

As can be seen from the values shown in Tables 3 to 5, approximately 50% of all malodorous gases were removed by the polypropylene film containing Maifan stone porous fine particles in 48 to 72 hours, and 2 It was observed that the malodorous gas was completely removed in 240 hours for the polypropylene film containing .5%.

Table 3 Table 4 (Initial gas concentration 50 PPM) Table 5 (First gas! tII concentration 3000 PPM) (Effects of the invention) According to the present invention, the porous maifan stone is rich in porosity and has excellent deodorizing and adsorption effects. A film composition containing fine particles can be obtained.

Claims (1)

[Claims] (1) Maifan stone, which is a type of rock belonging to quartz porphyry, is 0.
Porous material obtained by forming a film from a crystalline polymer composition in which porous fine particles ground to a diameter of 1 to 100 μ are dispersed in a crystalline polymer serving as a carrier at a rate of 0.1 to 5% (weight ratio). Membrane composition.