Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Reexamination Certificate
1998-08-04
2001-07-10
Watkins, III, William P. (Department: 1772)
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
C428S195100, C428S203000, C428S205000, C428S343000, C428S423100, C525S125000, C525S127000, C525S920000, C522S090000, C522S095000
Reexamination Certificate
active
06258441
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a soft coat film designed to be bonded to the surfaces of articles such as electrical appliances and furniture and, more particularly, to a soft coat film which is improved in terms of not only moldability and injury recovery but also wear resistance, impact resistance, scuffing resistance, tactile impression and so on.
BACKGROUND TECHNIQUE
In recent years, plastic materials including engineering plastics have been widely used as an alternative to metal materials or inorganic materials such as glass by taking advantage of their toughness, processability, etc. However, they must be provided with surface protecting layers due to their inferior surface hardness and scuffing resistance.
According to conventional techniques for making the surfaces of plastics hard, heat-curing resins such as those based on organosiloxane and melamine or polyfunctional polyacrylic photosetting resins have been coated on them, or thin metal films have been formed on them by vacuum deposition, sputtering or other means.
A problem with conventional scuffing-resistant surface protecting layers obtained with heat-curing or photosetting resins, however, is that they are so lacking in flexing properties that they are likely to crack. Thus, when forming surface protecting layers on curved moldings or synthetic resin films, they are still far from satisfactory, since some difficulty is involved in processing them into curved shapes or they crack by flexing. Even when used as surface protecting layers for flat planes, they are disadvantageous in that once injured, they are never restored to the original state or remain seriously damaged. Problems with surface protecting layers formed of thin metal films, on the other hand, are that because of being processed in vacuo, they are of low productivity and have difficulty in being processed into large sizes.
DISCLOSURE OF THE INVENTION
It is, therefore, an object of this invention to provide a soft coat film which is improved not only in terms of moldability and injury recovery but also in terms of scuffing resistance, impact resistance, wear resistance, tactile impression and so on, and can protect the surfaces of plastic, metallic, wooden and other products.
As a result of intensive studies made with the above object in mind, the present inventors have found that a soft coat film excelling in scuffing resistance, impact resistance, wear resistance, feel and other properties can be obtained by coating a film with a composition containing an urethane acrylate of a specific structure and irradiating that film with ionizing radiations. This finding underlies the present invention.
According to one aspect of this invention, there is provided a composition for soft coat films, which is characterized by containing as essential components (a) an urethane acrylate having a molecular weight of 500-50,000 and (b) a tactile improver.
The inventive soft coat film having a soft feel of tactile impression is characterized in that it is provided with a resin layer set by irradiating the aforesaid composition with ionizing radiations.
According to another aspect of this invention, there is provided a method for making soft coat films having a soft feel, which is characterized by forming between a support film and a laminating film a composition layer composed of a soft coat film composition containing (a) an urethane acrylate having a molecular weight of 500-50,000 and (b) a tactile improver, irradiating the thus obtained support film/composition layer/laminating film laminate with ionizing radiations to set the composition in said laminate, and releasing only said laminating film from said laminate.
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Kosaka Yozo
Oguchi Kiyoshi
Dai Nippon Insatsu Kabushiki Kaisha
Parkhurst & Wendel LLP
Watkins III William P.
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