摘要:
A blended composition of unsaturated block copolymer with improved thermal stability and processing behavior includes at least one unsaturated block copolymer; and a compatibilizer selected from the group consisting of (1) high melt flow rate homopolymers or copolymers; (2) styrene-ethylenepropylene-styrene (SEPS); (3) ethylene vinyl acetate (EVA); (4) styrene-butadiene-styrene (SBS), or styrene-isoprene-styrene (SIS) block copolymers; (5) single site catalyzed polyolefins, such as metallocene catalyzed and constrained geometry polyolefins; (6) amorphous poly alpha olefin homopolymer and copolymers; and (7) a combination of such.
摘要:
An elastic laminate capable of being rolled for storage and unwound from a roll when needed for use, includes an elastic layer selected from the group consisting of an array of continuous filament strands, an array of continuous filament strands with meltblown deposited on the continuous filament strands, and a film; a gatherable facing layer bonded to only one side of the elastic layer; and either an adhesive that demonstrates a relatively short open time deposited between the elastic layer and facing layer, or such adhesive and a postbonding adhesive or nonblocking agent, or a nonblocking agent layer deposited on the elastic layer on a side opposite to the facing layer.
摘要:
High-viscosity elastomeric adhesive compositions including a high softening point tackifier resin in combination with a base polymer can be used to create elastomeric composite laminates having effective adhesion and elastic properties. The elastomeric adhesive compositions suitably have a viscosity between about 100,000 and about 500,000 cps at between about 300 degrees Fahrenheit (149 degrees Celsius) and about 350 degrees Fahrenheit (177 degrees Celsius). Facing layers, such as nonwoven webs, films, elastic strands, fastening material, absorbent material, and the like, can be laminated to one or both surfaces of the elastomeric compositions to form elastomeric composite laminates. A method of making such compositions and laminates involves forming the compositions into elastomeric adhesive films and/or strands.
摘要:
The present invention is generally directed to webs, components, composites, and strands comprising re-activatable adhesive compositions, as well as health-and-hygiene products employing such webs, components, composites, and strands. By inputting energy to the web, component, composite, or strand (including, for example, an elastic web, component, composite, or strand) comprising a re-activatable adhesive composition, the adhesive is activated (i.e., rendered tacky) so that it can be used to join or adhere the web, component, composite, or strand to another material (or another location on the same web, component, composite, or strand). Generally, energy will be inputted to the adhesive in the form of infrared heat, heat, or ultrasonic energy, although any energy form may be used, so long as the energy is capable of activating the adhesive. Prior to activation, webs, components, composites, and strands comprising such re-activatable adhesives are convenient to handle because the adhesive is not yet tacky. Furthermore, the re-activatable adhesive may be activated at desired locations only, thereby permitting construction of bond patterns that promote desired characteristics (e.g., desired ratios of elastic properties and softness).
摘要:
High-viscosity elastomeric adhesive compositions including a high softening point tackifier resin in combination with a base polymer can be used to create elastomeric composite laminates having effective adhesion and elastic properties. The elastomeric adhesive compositions suitably have a viscosity between about 100,000 and about 500,000 cps at between about 300 degrees Fahrenheit (149 degrees Celsius) and about 350 degrees Fahrenheit (177 degrees Celsius). Facing layers, such as nonwoven webs, films, elastic strands, fastening material, absorbent material, and the like, can be laminated to one or both surfaces of the elastomeric compositions to form elastomeric composite laminates. A method of making such compositions and laminates involves forming the compositions into elastomeric adhesive films and/or strands.
摘要:
Elastic composite laminates are disclosed. The laminates include an elastic member bonded to at least one facing material. In accordance with the present disclosure, an adhesive composition is coextruded with an elastomeric material to form the elastic member. In this manner, the elastic member can be bonded to the facing material in a stretched state without having to apply a separate adhesive layer between the two materials. In one embodiment, the elastic member can be bonded to the facing material according to a pattern that includes bonded areas and non-bonded areas.
摘要:
Continuous or continual in-line processes for forming adhesive polymer blend compositions are described, as well as the application of those blends to a variety of substrates. In one or more embodiments, a first polymer component is provided in a first vessel, and a second polymer component is provided in a second vessel. The first polymer component comprises one or more styrenic block copolymers and one or more hydrocarbon tackifier resins, and the second polymer component comprises a polyolefin. The first and second polymer components are extracted from their respective holding vessels, mixed, and applied to a substrate. In some embodiments, the first and second polymer components may further comprise various additives. Adhesive blend compositions formed from the inventive processes are also described.
摘要:
A latent elastic laminate material, and methods of making latent elastic laminate materials. The laminate includes a latent polymer, which itself may or may not possess latent elasticity, that is applied to at least one elastic member while the elastic member is in a stretched configuration. The elastic member, at least partially covered with the latent polymer, is attached to at least one substrate. The amount of latent polymer applied to the elastic member may provide enough force to overcome a retractive force of the elastic member when the latent polymer is at a temperature below a softening point of the latent polymer, yet the amount of latent polymer may be small enough to allow the laminate to retract into an elastic, gathered structure when the laminate is heated to a softening point of the latent polymer. The laminate may be incorporated into a variety of articles including personal care garments and cleaning cloths.
摘要:
Provided is a process for making thermoplastic polymer pellets. The process has the following steps: (a) melting a thermoplastic polymer to form a polymer melt; (b) extruding the melt through a die to form a substantially continuous molten polymer extrudate wherein the die has a contact surface bearing a polymer coating having a surface energy of less than 25 mN/m at 20° C.; (c) cooling the extrudate to form a cooled extrudate; and (d) pelletizing the cooled extrudate to form a plurality of polymer pellets. Provided is also a polymer pellet shipping system and a stable thermoplastic polymer pellet.