OLEFIN BASED HOT MELT ADHESIVE COMPOSITIONS AND NONWOVEN AND PACKAGING ARTICLES INCLUDING THE SAME

• US 20120329353A1
• Filed: 06/27/2011
• Published: 12/27/2012
• Est. Priority Date: 06/27/2011
• Status: Abandoned Application

• Current Assignee: HB Fuller Company
• Original Assignee: HB Fuller Company
• Inventors: Davis, Kevin, Roska, Timothy W., Snyder, Barry
• Application Number:
  US13/169,653
• Publication Number:
  US 20120329353A1
• Time in Patent Office: Days
• US Class Current: 442/381
• CPC Class Codes: B31B 70/62 by adhesives
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2439/40 Closed containers
• CPC Class Codes: B32B 2439/46 Bags
• CPC Class Codes: B32B 2439/62 Boxes, cartons, cases
• CPC Class Codes: B32B 2555/00 Personal care
• CPC Class Codes: B32B 2555/02 Diapers or napkins
• CPC Class Codes: B32B 27/10 of paper or cardboard
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/22 using plasticisers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/327 comprising polyolefins obtained by a metallocene or single-site catalyst
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08F 112/08 Styrene
• CPC Class Codes: C08F 283/01 on to unsaturated polyesters C08F283/004 takes precedence
• CPC Class Codes: C08L 2207/14 Amorphous or atactic polypropylene
• CPC Class Codes: C08L 2314/06 Metallocene or single site catalysts
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C09J 123/10 Homopolymers or copolymers of propene
• CPC Class Codes: C09J 123/14 Copolymers of propene C09J123/16 takes precedence
• CPC Class Codes: Y10T 428/249981 : Plural void-containing components
• CPC Class Codes: Y10T 428/249993 : Hydrocarbon polymer
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon
• CPC Class Codes: Y10T 442/659 : Including an additional nonwoven fabric

Abstract

A hot melt adhesive composition that includes a non functionalized metallocene catalyzed polymer and a second polymer selected from the group including amorphous poly alpha olefins, uni-modal metallocene catalyzed polymers, hydrogenated styrenic block copolymers and combinations thereof and nonwoven and packaging articles including the same.

Claims

1. An adhesive composition comprising:

from about 5% by weight to about 55% by weight of a non functionalized metallocene catalyzed polymer comprising at least 50 weight % of polypropylene, the polymer having an Mw of about 10,000 to about 100,000 and an SEC graph that is multi-modal; and

a second polymer selected from the group consisting of amorphous poly alpha olefin, uni-modal metallocene catalyzed polymer, hydrogenated styrenic block copolymer and combinations thereof.

2. The composition of claim 1 further comprising from about 5% to about 60% by weight tackifying agent.

3. The composition of claim 2 further comprising a plasticizer.

4. The composition of claim 2 wherein the second polymer is an amorphous poly alpha olefin.

5. The composition of claim 4 wherein the amorphous poly alpha olefin comprises at least about 50 weight % polypropylene.

6. The composition of claim 1 comprising:

from about 10% by weight to about 40% by weight of the non functionalized metallocene catalyzed polymer;

from about 20% by weight to about 60% by weight of the amorphous poly alpha olefin; and

from about 5% by weight to about 35% by weight tackifying agent.

7. The adhesive composition of claim 1 wherein the composition has a spiral spray peel of at least 50 grams.

12. The composition of claim 1 further comprising a functionalized wax.

13. The composition of claim 12 further comprising a non functionalized wax.

14. The composition of claim 12 further comprising from about 1% by weight to about 15% by weight tackifying agent.

15. The composition of claim 12 wherein the second polymer is an amorphous poly alpha olefin.

16. The composition of claim 15 comprising at least 55% by weight of the amorphous poly alpha olefin.

17. The adhesive composition of claim 12, wherein the composition exhibits at least 50% fiber tear at −

20°

F., and at 150°

F. when tested according to the Fiber Tear Test Method.

8. An article comprising:

a first substrate;

a second substrate; and

an adhesive composition comprising;

from about 5% by weight to about 55% by weight of a non functionalized metallocene catalyzed polymer comprising at least 50 weight % of polypropylene, the polymer having an Mw of about 10,000 to about 100,000 and an SEC graph that is multi-modal; and

a second polymer selected from the group consisting of amorphous poly alpha olefin, uni-modal metallocene catalyzed polymer, hydrogenated styrenic block copolymer and combinations thereof.

where the first substrate is bonded to the second substrate through the adhesive composition, the composition exhibiting a bleed through value of no greater than about 10 grams.

9. The article of claim 8, wherein the first substrate and second substrate are selected from the group consisting of a porous substrate and a polymer film.

10. The article of claim 9, wherein the porous substrate is a nonwoven web.

11. The article of claim 8, wherein the article comprises a disposable article, filter, diaper, feminine hygiene article, sheet, absorbent pad, animal pad, medical drape, or an adult incontinence article.

18. A method of making a construction, the method comprising:

applying a hot melt adhesive composition comprising;

from about 5% by weight to about 55% by weight of a non functionalized metallocene catalyzed polymer comprising at least 50 weight % of polypropylene, the polymer having an Mw of about 10,000 to about 100,000 and an SEC graph that is multi-modal;

a second polymer selected from the group consisting of amorphous poly alpha olefin, uni-modal metallocene catalyzed polymer, hydrogenated styrenic block copolymer and combinations thereof; and

,

a functionalized wax

on a surface of a first substrate; and

contacting the applied adhesive composition with a second substrate such that the first substrate is bonded to the second throught the adhesive composition, the adhesive composition exhibiting a fiber tearing bond to the first and second substrates.

19. The method of claim 18, wherein at least one of the first and second substrates comprises at least one of paperboard, corrugated paperboard, cardboard, and coated cardboard.

20. A packaging construction made by the method of claim 18, the packaging construction being in a form selected from the group consisting of bag, box, carton, case and tray.