Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2000-05-16
2002-06-11
Moore, Margaret G. (Department: 1712)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C428S035700, C428S447000, C428S034200, C428S034300, C106S287140
Reexamination Certificate
active
06403183
ABSTRACT:
INDUSTRIAL FIELD OF THE INVENTION
The present invention relates to a coated material wherein a paper substrate such as cellophane paper, Japanese paper or foreign paper, or a fiber substrate such as non-woven fabric or cloth is used as the substrate, and a polymer membrane having a polysiloxane structure as the main structure is provided on the surface of at least one side of the substrate, which abounds in insulating properties and water repellency, has an appropriate strength and good light transmission properties, furthermore is rich in flame retardancy. The present invention also relates to a film or sheet for packing foods or a food container wherein paper or fiber mentioned above is used as the substrate and the polymer membrane having a polysiloxane structure as the main structure is provided at lease one side of the substrate, which abounds in insulating properties and water repellency, has an appropriate strength and good light transmission properties, furthermore is rich in flame retardancy. Further, the present invention relates to a protective cover for liquid crystal surface of an electronic device, a transparent article of stationery such as a clear holder or film case, a transparent container for an aromatic or a water repellent sheet for an automobile side mirror which is produced by fabrication of said film or sheet for packing foods, which abounds in insulating properties and water repellency, has an appropriate strength and good light transmission properties, furthermore is rich in flame retardancy.
BACKGROUND OF THE ART
Paper materials with a laminated surface or with a resin-coated surface are conventionally used in various fields. To exemplify a part of such materials often used for house building, for example, for a shoji sliding door as a open-close partition of Japanese rooms, rayon shoji paper produced by mixing rayon and polypropylene in a predetermined ratio, a shoji paper which is made by laminating a plastic film on the rayon shoji paper and shoji paper which is made by laminating an acrylic or vinyl chloride material on a Japanese paper surface have been used.
Other than such kinds of paper materials, sheet materials such as plastic sheet and vinyl sheet which generally have high light transmission properties as well as excellent water repellency have been known.
Also, polyvinylidene chloride (PVDC) has been in heavy usage of a film or sheet for packing foods due to its excellent oxygen barrier property.
Further, as a food container, for example, expanded polystyrene is used as a container for cup noodle or the like and, it is used, for example, a drawn transparent polypropylene resin-made container as a container for packing food which is subjected to microwave oven cooking.
PROBLEMS RESIDE IN THE PRIOR ART
There is a problem that the conventional paper materials except for paraffin paper, cellophane and the like cannot be used for a product required for light transmission properties, because of no light transmission properties. Further, these conventional paper materials are highly hygroscopic and insufficient in their strengths.
While the rayon shoji paper mentioned above and the like can dissolve the above problem to a certain degree, it is apt to generate static electricity, there being alternative problem that it is inclined to adsorb dust. Further, although the material itself is relatively resistant to water, there also is a problem that when wiped the dust off with a wet dustcloth, the material absorbs moisture so that the adhesive surface is inclined to peel off.
The plastic and vinyl sheets mentioned above and the like exhibit light transmission properties and water repellency higher than the papers. However, they are produced from a factory, therefore, it is very difficult to replace with the factory products furnishing goods such as a shoji sliding door as a open-close partition of Japanese rooms, which is given weight to quality and the like of the material. Further, in the plastic sheet, vinyl sheet and the like, in addition to the above problems, there is fear that when incinerated or the like, compounds acting as so-called environmental hormone or dioxin are generated due to various additives contained therein.
On the other hand, in the conventional film or sheet for packing foods, there is also fear that when incinerated or the like, compounds acting as so-called environmental hormone or dioxin are generated due to chloride atoms and the like contained therein because they are made of PVDC. In particular, plasticizers added thereto in order to improve workability is suspected of acting as an environmental hormone.
Also, in respect to expanded polystyrene used for cup noodle container and the like, or polypropylene resin used for food-packing containers which are subjected to microwave cooking, it is feared that styrene dimer and the like, which are suspected of being as environmental hormones are eluted from them. In particular, since there are cases where foods in food containers for microwave oven cooking are subjected to heating at higher than 200° C., it is required a new food container which can be used in microwave oven cooking at higher temperature by taking place of polypropylene resin having a melting point of approximately 160° C.
Thus, in the light of requirements for novel paper substrates for making furnishing goods and recent strict status with regard to global environment, environment-friendly materials useful for such paper materials, food-packing films and food containers are required.
PROBLEM TO BE SOLVED BY THE INVENTION
In the light of the problems concerning the conventional paper materials mentioned above, the first object of the present invention is to provide a coated material wherein a paper substrate such as cellophane paper, Japanese paper or foreign paper, or a fiber substrate such as non-woven fabric or cloth which is excel in quality as furnishing goods, is used as a substrate, which abounds in insulating properties and water repellency, has an appropriate strength and good light transmission properties, further is rich in flame retardancy.
Also, the second object of the present invention is to provide a film or sheet for packing foods made of the above mentioned coated material, which abounds in the insulating properties and water repellency, has an appropriate strength and good light transmission properties, is rich in flame retardancy, further has an oxygen barrier property, as well as is free from care about environmental hormones.
Further, the third object of the present invention is to provide a food container which has oxygen barrier property and is free from care about environmental hormones, and particularly, to provide a transparent food container which can be used as one wherein food in the container is subjected to microwave oven cooking at a higher temperature than 200° C.
Furthermore, the fourth object of the present invention is to provide an articles made of the above film or sheet for packing foods, including a protective cover for liquid crystal surface of an electronic device, a transparent article of stationery such as a clear holder or a film case, a transparent container for an aromatic or a water repellent sheet for an automobile side mirror, etc.
SUMMARY OF THE INVENTION
The present invention firstly accomplishes the first object mentioned above by providing a coated material having constitutions (1) to (5) as follows:
(1) a coated material comprising a substrate made of paper or fiber, and a polymer membrane having a polysiloxane structure as the main structure provided on the surface of at least one side of said substrate;
(2) a coated material, wherein said polymer membrane having a polysiloxane structure as the main structure is one made from a coating liquid comprising an alkoxysilane of the general formula (1):
(wherein, R
1
, R
2
, R
3
and R
4
are, the same or different with each other, a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and n is an integer of 2 to 8.);
(3) a coated material, wherein said coating liquid comprises an alkoxysilane of s
Goda Kazuhiko
Iwamiya Yoko
Kazari-Ichi Co., Ltd.
Moore Margaret G.
LandOfFree
Coated materials, and films, sheets and the like for packing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coated materials, and films, sheets and the like for packing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coated materials, and films, sheets and the like for packing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2955878