JP2002321327A - Glass coating polyolefin and formed product manufactured by using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new material having a transparent property and constant mechanical strength, usable as a substitutive material for materials such as a conventional glass and PET. SOLUTION: A glass coating polyolefin formed by adhering a fibrous material to which glass coating is subjected to one side or both side faces of polyolefin solves the problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is characterized in that a fiber material coated with glass is adhered to one or both surfaces of an olefin-based resin (polyolefin) such as polyethylene. The present invention relates to a glass-coated polyolefin that has high strength and transparency, does not emit a harmful gas that has an adverse effect on the environment and the human body when incinerated, and is easily reduced naturally by decomposition. In addition, the present invention, the above-mentioned glass-coated polyolefin, molded into a predetermined shape, rich in water repellency, in addition to having a suitable strength and transparency, such as dioxin and environmental hormones that adversely affect the environment and human body when incinerated The present invention relates to a molded product represented by, for example, a petri dish, an assembly box, a blister case, etc., which does not emit water and is easily reduced by decomposition and has sufficient mechanical strength.

[0002]

2. Description of the Related Art In view of the problems of conventional paper materials, the applicant of the present application has proposed a paper material such as cellophane paper, Japanese paper or Western paper, or a fiber material such as nonwoven fabric or cloth, which has excellent texture as personal belongings. As a substrate, a coating material in which the surface is coated with glass has been invented and a patent application has been filed (Japanese Patent Application No. 2000-136906, 2000-119).
176). With this coating material, various properties such as insulation, water repellency, flame retardancy, weather resistance, and oxygen barrier properties can be newly added to the inherent properties of materials such as paper and cellophane. Now you can.

[0003]

According to the above-mentioned glass coating material invented by the present applicant,
Unlike paper and cellophane, it is possible to add various properties such as insulation, water repellency, flame retardancy, weather resistance, and oxygen barrier to fiber materials such as paper and cellophane. It can be used for applications such as food packaging films or sheets, liquid crystal surface protective covers for electronic equipment, clear holders, transparent caseware such as film cases, transparent air freshener containers, and automotive side mirror surface water-repellent sheets. become able to. In other words, the glass coating material of the applicant of the present invention is an epoch-making material that greatly expands the range of use of paper and cellophane.

[0004] However, such a glass coating material is used for articles requiring a certain level of mechanical strength in addition to transparency, such as a petri dish often used in the field of science, and for example, a blister case ( (Transparent and irregularly shaped transparent material that conforms to the shape of the product, such as covering a product such as a toy or a DIY tool on paper) so that the product can be seen from the outside.
There is still room for improvement for use as an article that requires transparency and mechanical strength that is not as high as that of the above-mentioned petri dish, but that maintains a predetermined uneven shape.

[0005] That is, a glass coating material using paper as a base material has insufficient transparency. On the other hand, glass coating materials based on cellophane are easy to ensure sufficient transparency, but on the other hand, tend to lack mechanical strength, for example, or molded into a petri dish shape, It has been difficult to make irregularities according to the form of the product.

An object of the present invention is to provide a novel material suitable for securing transparency and mechanical strength, based on the previously completed invention, and to obtain the material by molding the material. An object of the present invention is to provide a molded product, such as a petri dish or a blister case, which requires transparency and a certain mechanical strength.

[0007]

Means for Solving the Problems According to the first aspect of the present invention, which has been made to achieve the above object, a fiber material coated with glass is attached to one or both surfaces of polyolefin. A glass-coated polyolefin. Further, the invention according to claim 2 of the present application is directed to the invention according to claim 1, wherein the fiber material that has been applied to the polyolefin and that has been subjected to glass coating is:
It is a cellophane material coated with glass. The invention of claim 3 of the present application is directed to the invention of claim 1 or 2, wherein the polyolefin is polyethylene. Further, the invention of claim 4 of the present application is directed to the invention of claims 1 to 3, wherein the glass coating applied to the fiber material is a coating of a polymer film having a polysiloxane structure as a main component. .

[0008] In order to achieve the above object, the invention of claim 5 of the present application provides a glass-coated polyolefin obtained by sticking a fiber material coated with glass on one or both surfaces of polyolefin. A molded product characterized by being molded into a shape. The invention according to claim 6 of the present application is characterized in that, in the invention according to claim 5, the fiber material coated with glass and attached to the polyolefin is a cellophane material coated with glass. The invention of claim 7 of the present application is directed to the invention of claim 5 or 6, wherein the polyolefin is polyethylene. The invention according to claim 8 of the present application is directed to the invention according to claims 5 to 7, wherein the glass coating applied to the fiber material is a coating of a polymer film having a polysiloxane structure as a main component. . According to a ninth aspect of the present invention, in accordance with the fifth to eighth aspects, the molded product is a blister case or a petri dish. Hereinafter, the invention of each claim of the present application will be described in detail.

The first invention of the present application is a glass-coated polyolefin. As illustrated in FIG. 1, the glass-coated polyolefin of the present invention is obtained by attaching a fiber material coated with glass to both surfaces or one surface of a polyolefin.

In FIG. 1, reference numeral 1 denotes a surface of a fiber material;
A polymer film formed by glass coating,
2 is a fiber material, and 3 is a polyolefin.
FIG. 1 shows an example in which a fiber material having a glass coating applied only to the upper surface is attached to the polyolefin 3; however, a fiber material having the same glass coating is applied to the lower surface thereof. be able to. In addition, as in the example of FIG. 1, when a fiber material coated with glass is attached only to one side, polyolefin such as polyethylene is exposed on the surface on which the fiber material coated with glass is not attached. Because
By heating or the like, pressure bonding with another polyolefin or the like can be easily performed. As a result, for example, by attaching one or more sheets of an appropriate material to the exposed surface, it becomes easy to provide a material having an arbitrary thickness.

On the other hand, the upper surface of the second fiber material, that is, only the side opposite to the polyolefin is coated with glass, and the surface not coated with glass is attached to the polyolefin. The fibrous material and the polyolefin can be easily attached (laminated), for example, by heating to about 200 ° C. and fusing, or by bonding with a binder that does not impair transparency.

The bonding (laminating) of the glass material with the fiber material and the polyolefin is performed by appropriately selecting various binders and bonding methods in consideration of the properties of the fiber material and the polyolefin. Can be implemented. For example, a sticking method is illustrated for reference. For example, a wet lamination process (wet lam
ination process, dry lamination process
ess), thermoplastic lamination process (ther
mopastic lamination proc
ess), pressure lamination process (pressu)
re lamination process, extrusion lamination process
Ination process) (Coating and Laminating Ma)
Chinas, by Herbert L. Weiss, Hisamitsu Hamada,
Translated by Yoshiaki Miyata, published on June 20, 1985, published by Processing Technology Research Group.)

The polyolefin used in the present invention is not particularly limited. For example, various materials such as polypropylene, polybutene, and polystyrene can be used in addition to polyethylene. It is polyethylene of about 25 micrometers. Such a polyolefin is widely commercially available, and a commercially available polyolefin can be used in the present invention.

The fibrous material used in the present invention is not particularly limited, but is, for example, a transparent cellophane having a thickness of about 30 to 35 micrometers. Such cellophane is also widely marketed, but examples thereof include Taiko moisture-proof cellophane, ordinary cellophane PT # 300, PT
PF3 # 300, PT # 500, Moistureproof cellophane MS
TAZ # 300 (both trade names, manufactured by Nimura Chemical Industry Co., Ltd.) and the like can be exemplified. Among the cellophane exemplified, moisture-proof cellophane MST AZ # 300 (trade name, manufactured by Nimura Chemical Industry Co., Ltd.) is a moisture-proof cellophane coated with a special acrylic resin containing no chlorine, and is harmful to dioxins even when incinerated. Since such a substance is not generated, it can be particularly preferably used in the present invention.

The glass coating applied to a fiber material such as cellophane is disclosed in the above-mentioned patent application (Japanese Patent Application No. 2000-136906, 2000-119176).
), Which can be easily implemented by referring to this. An example will be described below for reference.

The glass coating of the fiber material according to the present invention comprises forming a polymer film on the surface of the fiber material using a coating liquid containing alkoxysilane as a main component. The formation of the polymer film is performed by applying a coating solution to the surface of the fiber material.

This coating liquid contains a compound represented by the general formula (1) as a main component.

(Equation 1) (In the formula 1, R ₁ , R ₂ , R ₃ and R ₄ may be the same or different, and each has a hydrogen or carbon number of 1 to 4.
Is an alkyl group of

The compound represented by the general formula (1) is not hydrolyzed with an adjacent silicon atom in a subsequent hydrolysis / polycondensation reaction, and R4 which does not take part in the siloxane bond is, as it were, "dangling phosphorus". In order to provide the glass coating polyolefin of the present invention with good moldability, the glass coating of the polymer film formed on the surface of the fiber material is given flexibility. become. In addition, the imparting of flexibility to the coating film is performed by the following general formula (2) and / or general formula (3).
It can be adjusted freely by using the compound represented by

R in the compound represented by the general formula (1)
₁ , R ₂ and R ₃ may be the same or different and each is an element or an alkyl group having 1 to 4 carbon atoms, and n is preferably 2 to 10. Such a compound can be obtained by condensing various silane monomers (for example, methyltrimethoxysilane). The reason for repeating the main chain from n = 2 to 10 is that n = 1, that is, when a monomer is used, it takes a long time to polymerize, and a polymer film having sufficient strength is produced in a short time. This is because it becomes difficult. However, when n is 11 or more,
Conversely, when applied to a fiber material, the number of alkoxy groups and the like for polymerization on the fiber material is insufficient, and it becomes difficult to produce a polymer film having sufficient strength. Therefore, it is preferable that n = 2 to 10, especially n = 2
To 8 condensates. In general, when a condensate represented by the general formula (1) is synthesized from a monomer, it is practically impossible to control the degree of polymerization accurately from a technical point of view. Therefore, n = 2 to 10, preferably n = 2
The use of a compound having a molecular weight of from 8 to 8 means that n is mainly 2 to 10, preferably 2 mainly from the viewpoint of the distribution of the degree of polymerization.
The use of a coating solution containing the compounds of the formulas (1) to (8) is also essential. For example, a compound having n of 11 or more may be contained.

The compound represented by the general formula (1) includes
Specifically, for example, methyltrimethoxysilane, ethyltrimethoxysilane, propyltrimethoxysilane, butyltrimethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, butyltriethoxysilane, methyltripropoxysilane, Condensates such as ethyltripropoxysilane, propyltripropoxysilane, and butyltripropoxysilane can be exemplified. Further, the compound of the general formula (1) may be a condensate obtained by condensing only one kind of the monomer as exemplified above, or a condensation product obtained by condensing two or more kinds of the monomer as exemplified above. It may be a body.

The primary role of the general formula (1) non-hydrolyzable in the compound represented by substituents (R ₄₎ is located to provide flexibility to the polymer film, as R ₄ When the compound represented by the general formula (1) having an alkyl group is used, water repellency is imparted at the same time, and as a result, water repellency is also imparted to the glass-coated polyolefin of the present invention. . In general, organic substituents increase in organic property, that is, water repellency, as the number of carbon atoms increases.However, when the number of carbon atoms becomes too large, distortion occurs in the polymer film due to steric hindrance, and the strength of the film decreases. It can also cause Therefore, when imparting water repellency to the glass-coated polyolefin of the present invention, the number of carbon atoms of the alkyl group represented by R4 and each monomer constituting the compound (condensate) represented by the general formula (1) Body type
Preferably, the amount is determined, for example, by conducting a preliminary production test. However, imparting water repellency to the polymer film can also be achieved by adding a compound represented by the following general formula (2) or (3), so that the compound represented by the general formula (1) Is not essential for imparting water repellency.

As the catalyst for curing and solidifying the compound represented by the general formula (1), a commonly used catalyst can be used without any particular limitation. For example, in the case of an acid catalyst, hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, formic acid or acetic acid can be exemplified. Examples of the base catalyst include ammonia, tetramethylammonium hydroxide, 2-hydroxyethyltrimethylammonium hydroxide, ethanolamine, diethanolamine, and triethanolamine. When these ordinary catalysts are used, reaction water is allowed to coexist in order to cure and solidify the compound of the general formula (1).

As described above, the coating liquid has the general formula (1)
, A catalyst and water of reaction. The coating liquid having such a composition does not cause any particular problem when used normally, but has a problem that the coating liquid is easily gelled by the reaction water when stored for a long time. In order to solve this, instead of the usual catalyst as described above,
It is preferable to use a hydrolyzable organometallic compound as a catalyst. The use of a hydrolyzable organometallic compound eliminates the need for coexisting reaction water, thereby improving long-term storage stability. That is, the organometallic compound is mixed with the compound of the general formula (1) to form a coating solution, and when this is applied to a fiber material, the moisture of the fiber material and the moisture (humidity) in the air are absorbed, and the organometallic compound hydrolyzes itself. Decomposes, at this time, forms a network with the compound represented by the general formula (1), and cures and solidifies this. Examples of the organometallic compound preferably used for such a purpose include those containing titanium, zircon, aluminum or tin. More specifically, examples thereof include tetrapropoxytitanate, tetrabutoxytitanate, tetrapropoxyzirconate, tetrabutoxyzirconate, tripropoxyaluminate, aluminum acetylacetonate, dibutyltin diacetate, and dibutyltin dilaurate.

Further, an organic solvent can be added to the coating liquid in order to uniformly mix the compound represented by the general formula (1), the catalyst, and optionally required reaction water. Examples of the organic solvent used for this purpose include alcohols. More specifically, examples include methanol, ethanol, propanol, isopropanol, butanol, pentanol and hexanol.
Further, by controlling the amount of addition, the viscosity of the coating liquid and the drying speed can be adjusted. For the purpose of such adjustment, in particular, for example, glycols such as ethylene glycol, propylene glycol, diethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, methoxyethanol, propoxyethanol, butoxyethanol, methoxypropanol, ethoxypropanol, propoxypropanol Alternatively, it is preferable to use an organic solvent having a high viscosity and a high boiling point, such as cellsolves such as butoxypropanol, alone or as a mixture of two or more. Of course, the above-mentioned alcohols may be added together with at least one of the above-mentioned organic solvents having a high viscosity and a high boiling point. When the purpose is to adjust the viscosity or drying speed of the coating liquid, the same effect can be achieved not only by the organic solvent but also by a surfactant.

The above-mentioned glycols and cellosolves are
Since the compound has a hydroxyl group in the molecule, it may be introduced into a siloxane bond network formed by a condensation reaction of the compound of the general formula (1). Since glycols and cellosolves have organic properties, their introduction increases the flexibility and organicity of the resulting polymer film, and consequently the flexibility and organicity of the glass-coated polyolefin. Will increase.

The fiber material coated with glass is
It can be obtained by applying a coating liquid to the fiber material and heating it at a temperature range that does not affect the fiber material, for example, 300 ° C. or less, preferably 80 to 150 ° C., for about 2 minutes to 1 hour. Although a specific application method is not particularly limited, for example, application by a method such as dipping application, spray application, screen application, screen printing, offset printing, and gravure printing can be exemplified. Here, the coating liquid may be applied to the fiber material in such an amount that the polymer film has a predetermined thickness, preferably about 10 micrometers. In addition, by performing a predetermined pre-treatment on the fiber material before applying the coating liquid, the bond between the paper material surface and the coat film is compared with the fiber material not subjected to the pre-treatment. Can be strengthened. As an example of this pretreatment, for example, the fiber material is immersed in high-purity isopropyl alcohol of about 98% for about 30 minutes, then left at a high temperature of about 100 ° C., completely dried, and then for about 30 minutes A pretreatment of irradiating ultraviolet rays can be exemplified.

As described above, when a coating solution is applied to a fiber material that has been subjected to a predetermined pretreatment or has not been subjected to the pretreatment,
The compound of the general formula (1) is hydrolyzed, and
Through the reaction shown in (3), the siloxane bond (Si
—O—Si) is produced.

[Reaction formula 1]

When the coating liquid contains the above-mentioned organometallic compound (for example, tetrabutoxytitanium) as a catalyst, even if the coating liquid does not contain water of reaction, the above formula (1) in the above reaction formula 1 is used. The reaction of (3) proceeds, and the reaction in this case is specifically as shown in (4) and (5) in the following reaction formula 2.

[Reaction formula 2]

By using a coating solution containing a compound represented by the following general formula (2) in addition to the compound represented by the above general formula (1), a fiber material coated with glass can be treated with the general formula ( The compound represented by 2) may be newly imparted with properties such as organic properties, increased in properties such as organic properties, or further increased in flexibility to increase the organic properties of the glass-coated polyolefin of the present invention. It is possible to improve performance and flexibility. Equation 2 added for this purpose
Is a compound in which three of the four substituents are hydrolyzable substituents and the remaining one is a non-hydrolyzable substituent.

(Equation 2) (In the formula 2, R ₅ , R ₆ , and R ₇ may be the same or different, and each is a monomer composed of hydrogen, an alkyl group, or an alkenyl group, and R ₅ O, R ₆ O, and R ₇ O are The bond with Si is an oligomer composed of a siloxane bond, and R ₈ is an alkenyl group or a phenyl group which may contain an epoxy group or a glycidyl group in the molecule.

Specific examples of the compound represented by the general formula (2) include vinyltrimethoxysilane, phenyltrimethoxysilane, γ- (methacryloxypropyl) trimethoxysilane, and γ-glycidoxypropyltrimethoxy. Silane, aminopropyltrimethoxysilane, β- (3,4 epoxycyclohexyl) ethyltrimethoxysilane, vinyltriethoxysilane, phenyltriethoxysilane, γ- (methacryloxypropyl) triethoxysilane, γ-glycidoxypropyltri Examples thereof include ethoxysilane, aminopropyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, and condensates of about 2 to 10 molecules thereof. The compound of the general formula (2) may be two or more of such monomers. When a condensate of two or more molecules is used as the compound represented by the general formula (2), two or more of such monomers may be condensed.

Furthermore, a coating solution containing the compound represented by the general formula (1) or a coating solution containing both the compound represented by the general formula (1) and the compound represented by the general formula (2) By using a coating solution to which the compound represented by the general formula (3) is further added, the general formula (3)
In the compound represented by, to newly impart properties such as organic properties, or to increase the properties such as organic properties, and further, by increasing the flexibility, the organic properties of the glass-coated polyolefin of the present invention and It is possible to improve flexibility.

(Equation 3) (In the formula 3, R ₉ and R ₁₁ may be the same or different and each is a monomer composed of hydrogen, an alkyl group or an alkenyl group, and R ₉ O and R ₁₁ O and Si
Is an oligomer consisting of a siloxane bond,
R ₁₀ and R ₁₂ are an alkyl group, an alkenyl group or a phenyl group which may contain an epoxy group or a glycidyl group in the molecule.

As the compound represented by the general formula (3),
Specifically, dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, methylvinyldimethoxysilane,
Methylvinyldiethoxysilane and the like, and 2 to 1
A condensate of about 0 molecules can be exemplified. The general formula (3)
May be two or more of such monomers,
Further, when a condensate of two or more molecules is used, two or more condensates of such a monomer may be used.

Either the compound represented by the general formula (2) or the compound represented by the general formula (3) as described above is added to a coating solution containing the compound represented by the general formula (1). However, if both of these compounds are added to the coating solution, the organic properties of the polymer film can be further improved, and as a result, the glass coating polyolefin can be repelled. Water and the like can be further improved. At the same time, it is also effective in making the glass-coated polyolefin more flexible as described above.

The compound represented by the general formula (2) and / or the compound represented by the general formula (3) is different from the compound represented by the general formula (1), which is the main component of the coating solution, by the general formula Specifically, it is preferable to add it in a range where the total amount does not exceed 50%. If the total amount of the two exceeds this range, when the coating solution is applied to the fiber material, it does not bond well with the compound represented by the general formula (1) as the main component, and the strength of the polymer film is reduced. Is likely to be insufficient. Therefore, the compound represented by the general formula (2) and / or
Alternatively, when the compound represented by the general formula (3) is added, the objective is achieved by conducting a preliminary test or the like, assuming that the strength of the polymer film is reduced depending on the amount of addition. After clarifying the range of possible addition amounts, it is preferable to minimize the addition.

The non-hydrolyzable substituents (R ₈ , R ₁₀ , R ₁₂ ) in the compound represented by the general formula (2) and the compound represented by the general formula (3) are substituted by an alkyl group or the like. Since they are organic substitutions, their role is to impart water repellency to the polymer film and, at the same time, to impart flexibility. However, in general, the organic substituent increases the organic property, that is, the water repellency, as the number of carbon atoms increases. Becomes Therefore, the number of carbon atoms of the organic substituent and the type and amount of each monomer constituting the compound (condensate) represented by the general formula (2) and / or the general formula (3) are determined by preliminary production tests. Is preferably determined.

As described above, the glass-coated polyolefin of the present invention can be produced by attaching (laminating) a fiber material coated with glass to one or both surfaces of a polyolefin such as polyethylene. By molding this glass-coated polyolefin into a predetermined shape, it is possible to produce a molded product having transparency and constant mechanical strength. In the production, as a method of molding the glass-coated polyolefin, it is possible to use a method known per se, for example, a method of die cutting, embossing, vacuum molding, and a molding apparatus is also commercially available. Can be used.

More specifically, for example, the glass-coated polyolefin of the present invention is placed on a hot plate at 145 ° C. using a commercially available molding machine (manufactured by GN Machinery Canada). By pressing a mold heated to 90 ° C. from above and bringing it into close contact with the mold in a vacuum state for about 2 seconds, it is molded into a predetermined shape along the shape of the mold,
After that, it can be exemplified that the shape is adjusted while cooling by applying an air pressure of about 3.5K.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the glass-coated polyolefin of the present invention and a molded product obtained by molding the polyolefin into a predetermined shape according to the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. It is not something to be done.

Example 1 First, 181 g of methyltrimethoxysilane, 50 g of methanol and 18 g of pure water were placed in a 500 ml three-necked flask.
Was added and stirred sufficiently. Further, 2 g of 61% nitric acid was added, and the mixture was heated and refluxed for 3 hours while stirring. After the reaction was completed, the pressure inside the reaction vessel was reduced while heating to remove methanol. According to gas chromatography analysis, the thus-obtained compound represented by the general formula (1), methyltrimethoxysilane condensate, was mainly a trimer to a tetramer. Using the methyltrimethoxysilane condensate prepared as described above, a coating solution containing this as a main component was prepared. Specifically, the coating liquid is 14 g of a methyltrimethoxysilane condensate, 5 g of γ-glycidoxypropyltrimethoxysilane which is a compound represented by the general formula (2), 2 g of isopropyl alcohol as the solvent, and the catalyst Contains 0.8 g of dibutyltin diacetate.

Next, using the coating solution prepared as described above, cellophane as a fiber material was coated with glass. In this example, a commercially available cellophane (ordinary cellophane PT # 500,
(Trade name, manufactured by Nimura Chemical Industry Co., Ltd., about 35 micrometers thick). On one side of this cellophane, the coating solution prepared as described above was applied to a commercially available gravure coating machine (CA).
-130, trade name, manufactured by Okazaki Machine Industry Co., Ltd.) and dried by heating at 150 ° C. for 3 minutes.
A polymer film having a thickness of about 10 micrometers was formed.

Cellophane coated with glass on one side as described above was attached to a commercially available polyethylene sheet (manufactured by Nitto Kogyo KK, about 25 micrometers thick). Specifically, using two cellophane, as shown in FIG. 2, sandwich the cellophane non-glass coated surface so as to be in close contact with the polyethylene sheet, and heat to about 200 ° C. Fused (hereinafter,
The glass-coated polyethylene thus produced is referred to as "glass-coated polyethylene 1"). In this example, as shown in FIG. 2, glass-coated polyethylene having a thickness of about 115 micrometers having a polymer film formed by glass coating on both surfaces was manufactured. However, as shown in FIG. Is applied only to the upper surface, a glass-coated polyethylene having a thickness of about 70 micrometers can be manufactured. Further, in the case of the glass-coated polyolefin as shown in FIG. 1, the thickness can be freely adjusted by further heat-sealing a polyolefin sheet on the surface where the polyolefin is exposed.

Example 2 A commercially available cellophane (moisture-proof cellophane MST AZ # 300, trade name,
(Niimura Chemical Industry Co., Ltd., thickness about 35 micrometers)
A glass-coated polyethylene was manufactured in the same manner as in Example 1 except that the glass-coated polyethylene was used (hereinafter, the glass-coated polyethylene thus manufactured is referred to as “glass-coated polyethylene 2”).

Example 3 Glass-coated polyethylenes 1 and 2 manufactured as in Examples 1 and 2 were molded to manufacture petri dishes, blister cases for button batteries and blister cases for memory sticks.

For molding, first, a commercially available molding machine (Canada GN)
While heating the glass-coated polyethylene to 145 ° C. on a hot plate, press the molds of each shape heated to 90 ° C. and bring them into close contact with the molds in a vacuum for about 2 seconds. By molding into a predetermined shape according to the shape of the mold, the shape is adjusted while cooling by applying air pressure of about 3.5K, and then, each molded product is separated by punching. Was.

The petri dish manufactured as described above is
It was transparent, and the liquid dispensed inside did not leak, and the shape did not bend due to the weight of the liquid, confirming that it had sufficient mechanical strength. In addition, the blister cases are all transparent and have sufficient mechanical strength to allow the stored button batteries or memory sticks to be observed from the outside, and to protect the button batteries or memory sticks housed inside from external impact. Was confirmed. In addition, in the blister case, by making a cut in the end part, the case was cut by hand and the button battery and the like housed inside could be easily taken out. This is considered to be due to the fact that the good cellophane hand-cutting properties are inherited as it is in the glass-coated polyethylenes 1 and 2.

Further, the sheets of glass-coated polyethylene 1 and 2 could be easily creased as if the paper were creased. By the way, if you put a fold, you can easily and bend it at that part, like a filing case (it is folded into a plane at first, but if you fold the fold in order, it will become a three-dimensional case) In addition, it became clear that it is also excellent as a product packaging box that instantly rises into a three-dimensional box from a state folded in a plane.

[0047]

The glass-coated polyolefin of the present invention, which is obtained by sticking a transparent fiber material such as cellophane with a glass coating to a transparent polyolefin such as polyethylene, has a certain level of mechanical properties in addition to its transparency. It is an excellent material having strength and solves the problem to be improved, which has been previously invented by the present applicant, and is found in the glass coating material. Conventionally, articles requiring a certain mechanical strength in addition to transparency include, for example, glass and PET (polyethylene terephthalate; Pol).
Although it has been manufactured using a material such as "yetene Terephthalate", the present invention achieves the effect of providing an alternative material to such a material.

For example, although glass is excellent in moldability, molding must be performed under a high temperature condition at which glass can be melted, so that certain equipment and the like are required, and ultimately the cost becomes high. In this case, the user must repeatedly use the petri dish by washing the used petri dish and sterilizing the dish with an autoclave, unless otherwise specified. On the other hand, since the glass-coated polyolefin of the present invention can be provided at low cost, the petri dish molded from this can be disposable, and the problem of contamination due to repeated use of the petri dish can be avoided. . Also, for example, in PET, even if it is stomped on, it does not easily move, so the volume increases when discarded,
The glass-coated polyolefin of the present invention is, as shown in Examples, easy to bend,
It also has the effect that the volume does not increase upon disposal.

As described above, the present invention is characterized in that a fiber material coated with glass is adhered to one or both surfaces of an olefin resin (polyolefin) such as polyethylene. Provides glass-coated polyolefins that are rich in water, have appropriate mechanical strength and transparency, do not release dioxins and environmental hormones that have a negative effect on the environment and the human body when incinerated, and are easily reduced naturally by decomposition. It is. The safety at the time of incineration and the reducibility due to decomposition are particularly remarkable when cellophane containing cellulose as a main component is employed. Further, the present invention, by molding such a glass-coated polyolefin into a predetermined shape, is rich in water repellency, has an appropriate mechanical strength and transparency, and also eliminates aggressive gas that has a bad influence on the environment and the human body at the time of incineration. The present invention relates to a molded product, such as a petri dish, an assembly box, or a blister case, which is not released and is easily reduced by decomposition. It is clear that the present invention can be widely applied to molded products requiring transparency and a certain mechanical strength, and the above is only an example.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the structure of a glass-coated polyolefin of the present invention.

FIG. 2 is a diagram for explaining a structure of a glass-coated polyethylene manufactured in an example.

[Explanation of symbols]

1 Glass-coated polymer film formed on the surface of a fiber material 2 Fiber material 3 Polyolefin 4 Glass-coated polymer film formed on the surface of a fiber material 5 Fiber material (cellophane) 6 Polyolefin (polyethylene)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08J 7/04 CEP B65D 1/00 BRNB // B65D 5/43 BSF C08L 1:00 5/42 Z F term (Ref.) BA10E DG01B DG01C EJ24 EJ42 GB16 GB71 JB06 JK01 JL16 JN01

Claims (9)

[Claims] 1. A glass-coated polyolefin characterized in that a fiber material coated with glass is attached to one or both surfaces of polyolefin. 2. The fiber material coated with glass and adhered to the polyolefin is a cellophane material coated with glass.
Glass coated polyolefin. 3. The glass-coated polyolefin according to claim 1, wherein the polyolefin is polyethylene. 4. The glass-coated olefin resin according to claim 1, wherein the glass coating applied to the fiber material is a coating of a polymer film having a polysiloxane structure as a main component. 5. A molded product obtained by molding a glass-coated polyolefin into a predetermined shape by attaching a fiber material coated with glass to one or both surfaces of the polyolefin. 6. The molded article of glass-coated polyolefin according to claim 5, wherein the fiber material coated with glass and adhered to the polyolefin is a cellophane material coated with glass. 7. The molded article of glass-coated polyolefin according to claim 5, wherein said polyolefin is polyethylene. 8. The molded article of glass-coated polyolefin according to claim 5, wherein the glass coating applied to the fiber material is a coating of a polymer film having a polysiloxane structure as a main component. 9. The molded product is a blister case, an assembly box or a petri dish.
To 8 molded products of glass-coated polyolefin.