The methods herein relate to assembling an elastic laminate with a first elastic material and a second elastic material bonded between first and second substrates. During assembly, an elastic laminate may be formed by positioning the first and second substrates in contact with stretched central regions of the first and second elastic materials. The elastic laminates may include two or more bonding regions that may be defined by the various layers or components of the elastic laminate that are laminated or stacked relative to each other. In some configurations, a first plurality of ultrasonic bonds are applied to the elastic laminate to define a first bond density in the first bonding region, and a second plurality of ultrasonic bonds are applied to the elastic laminate to define a second bond density in the second bonding region, wherein the second bond density is not equal to the first bond density.

The methods herein relate to assembling an elastic laminate with a first elastic material and a second elastic material bonded between first and second substrates. During assembly, an elastic laminate may be formed by positioning the first and second substrates in contact with stretched central regions of the first and second elastic materials. The elastic laminates may include two or more bonding regions that may be defined by the various layers or components of the elastic laminate that are laminated or stacked relative to each other. In some configurations, a first plurality of ultrasonic bonds are applied to the elastic laminate to define a first bond density in the first bonding region, and a second plurality of ultrasonic bonds are applied to the elastic laminate to define a second bond density in the second bonding region, wherein the second bond density is not equal to the first bond density.

A water-soluble film includes a polyvinyl alcohol resin (A) as a main component, wherein the ratio (X.sub.TD/X.sub.MD) of a degree of elongation (X.sub.TD) in the transverse direction (TD) of the water-soluble film to a degree of elongation (X.sub.MD) in the machine direction (MD) thereof when the water-soluble film is floated on the surface of water at 20° C. for 60 seconds is from 1.05 to 1.5. The water-soluble film exhibits reduced curling, exhibits reduced positional shift, and shows satisfactory sealability while forming a package.

A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:
−15≤ΔT.sub.70-65≤0  Relationship 1
0≤ΔT.sub.100-95≤5  Relationship 2 wherein ΔT.sub.X-Y is a value obtained by subtracting heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at Y° C. from heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at X° C.

A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:
−15≤ΔT.sub.70-65≤0  Relationship 1
0≤ΔT.sub.100-95≤5  Relationship 2 wherein ΔT.sub.X-Y is a value obtained by subtracting heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at Y° C. from heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at X° C.

A method for purifying a gas inside a polymer film production furnace with the use of the purification catalyst is provided. A purification catalyst for a gas inside a polymer film production furnace, contains a mixed oxide composed of a manganese-based oxide containing manganese and potassium and having a cryptomelane structure, and copper oxide. A method for purifying a gas inside a polymer film production furnace, includes a step 1 of bringing hot air containing volatile and/or sublimable organic substances, generated during production of a polymer film by the polymer film production furnace, into contact with the catalyst provided inside or outside the furnace, at a temperature in the range of 200 to 350° C. to decompose the organic substances oxidatively, and a step 2 of refluxing all or a part of a resultant decomposition gas to the polymer film production furnace.

A method for purifying a gas inside a polymer film production furnace with the use of the purification catalyst is provided. A purification catalyst for a gas inside a polymer film production furnace, contains a mixed oxide composed of a manganese-based oxide containing manganese and potassium and having a cryptomelane structure, and copper oxide. A method for purifying a gas inside a polymer film production furnace, includes a step 1 of bringing hot air containing volatile and/or sublimable organic substances, generated during production of a polymer film by the polymer film production furnace, into contact with the catalyst provided inside or outside the furnace, at a temperature in the range of 200 to 350° C. to decompose the organic substances oxidatively, and a step 2 of refluxing all or a part of a resultant decomposition gas to the polymer film production furnace.

The present disclosure relates to methods for assembling elastic laminates that may be used to make absorbent article components. Particular aspects of the present disclosure involve providing a first substrate and a second substrate, the first substrate and the second substrate, each having a width in a cross direction; providing an activated elastic material; elongating the activated elastic material; and ultrasonically bonding the first substrate together with the second substrate with the elongated activated elastic material positioned between the first substrate and the second substrate.

The present disclosure relates to methods for assembling elastic laminates that may be used to make absorbent article components. Particular aspects of the present disclosure involve providing a first substrate and a second substrate, the first substrate and the second substrate, each having a width in a cross direction; providing an activated elastic material; elongating the activated elastic material; and ultrasonically bonding the first substrate together with the second substrate with the elongated activated elastic material positioned between the first substrate and the second substrate.

An integral polymer grid with a plurality of interconnected, oriented polyethylene terephthalate strands and an array of openings therein is made from a polyethylene terephthalate sheet-like starting material having holes or depressions therein that form the openings when the sheet-like material is uniaxially or biaxially stretched. The grid has a higher tensile strength to weight ratio and a higher creep reduced strength to weight ratio than corresponding ratios associated with a grid made from a non-polyethylene terephthalate starting material.