Method for linking two plastic work pieces without using foreign matter
First Claim
1. Method for non-adhesive bonding of two contiguous plastic work pieces (2, 3;
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5, 6) characterized in that;
the intended contact surface (K) of at least one of the two work pieces (2, 5 or 3, 6) by which it borders on the other work piece (3, 6 or 2, 5) is at least in some sections subjected to a high-energy radiation which causes the lowering of the glass transition temperature in a marginal layer (R, R′
), the two work pieces (2, 3;
5, 6) are brought into a mutual position according to the intended use, and subsequently, to produce the bond of the two work pieces (2, 3;
5, 6) at least the modified marginal layer (R, R′
) in the area of its surface is heated to a temperature which is above the glass transition temperature of the marginal layer (R, R′
) modified by radiation, but below that of the unmodified areas of the respective work piece (2, 3;
5, 6).
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Accused Products
Abstract
The invention relates to a method for linking two adjacent plastic work pieces (2, 3). The inventive method is characterized in that the intended contact zone (K) of at least one of the two work pieces (2) with which the latter adjoins to the other work piece (3) is at least partially subjected to a high-energy radiation to such an extent that the glass transition temperature is reduced in a marginal zone (R). The two work pieces (2, 3) are brought in the desired position relative to each other. For establishing the connection of the two work pieces (2, 3) at least the marginal zone (R) modified by the previous radiation process is heated at least in its surface area to a temperature that is higher than the glass transition temperature of the marginal zone (R) modified by the radiation process but lower than the glass transition temperature of the zones of the work pieces (2, 3) that have not been modified. The invention also relates to an article (1) produced according to the inventive method that consists of two work pieces (2, 3) that are linked without using foreign matte. The inventive article is characterized in that recesses (V), especially channel-shaped recesses, are introduced in at least one contact zone (K) of the two work pieces (2).
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Citations
20 Claims
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1. Method for non-adhesive bonding of two contiguous plastic work pieces (2, 3;
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5, 6) characterized in that;
the intended contact surface (K) of at least one of the two work pieces (2, 5 or 3, 6) by which it borders on the other work piece (3, 6 or 2, 5) is at least in some sections subjected to a high-energy radiation which causes the lowering of the glass transition temperature in a marginal layer (R, R′
),the two work pieces (2, 3;
5, 6) are brought into a mutual position according to the intended use, andsubsequently, to produce the bond of the two work pieces (2, 3;
5, 6) at least the modified marginal layer (R, R′
) in the area of its surface is heated to a temperature which is above the glass transition temperature of the marginal layer (R, R′
) modified by radiation, but below that of the unmodified areas of the respective work piece (2, 3;
5, 6). - View Dependent Claims (2)
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5, 6) characterized in that;
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3. A hot-melt adhesion method for bonding two plastic work pieces, each work piece having an intended contact surface by which the two work pieces bond, the method comprising the steps of:
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subjecting at least some sections of the intended contact surface of at least one of the work pieces to a high-energy radiation that causes the lowering of a glass transition temperature of such work piece in a marginal layer to produce a modified marginal layer;
contacting the intended contact surfaces of the two work pieces; and
heating at least the modified marginal layer to a temperature above the glass transition temperature of the modified marginal layer but below that of the unmodified areas of the respective work piece so that a bond is formed between the two work pieces. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. A hot-melt adhesion method for bonding two plastic work pieces, each work piece having an intended contact surface by which the two work pieces bond and wherein one work piece is comprised of microstructure or nanostructure recesses in the contact surface and the other work piece includes electrodes on its contact surface, the method comprising the steps of:
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subjecting at least some sections of the intended contact surface of at least one of the work pieces to a high-energy radiation that causes the lowering of a glass transition temperature of such work piece in a marginal layer to produce a modified marginal layer;
contacting the intended contact surfaces of the two work pieces; and
heating at least the modified marginal layer to a temperature above the glass transition temperature of the modified marginal layer but below that of the unmodified areas of the respective work piece while the two work pieces are under pressure in relation to each other so that a bond is formed between the two work pieces.
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13. An article for microfluidics applications comprising:
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a first and a second plastic work piece, each having a contact surface by which the two work pieces are hot-melt adhesion bonded together;
whereinmicrostructure or nanostructure recesses are provided in the contact surface of the first work piece; and
a modified marginal layer is produced by high-energy radiation in at least a section of at least one of the contact surfaces, such that the modified marginal layer is characterized by a glass transition temperature lower than that of unmodified areas of the respective work piece. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification