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Composite webs with discrete elastic polymeric regions

An elastomeric polymer, polymer technology, applied in household appliances, non-woven fabrics, other household appliances, etc., can solve the problem of difficulty in providing elastic recovery force changes, increasing the production cost of elastic laminated backing, and difficult to firmly connect elastic parts. implementation issues

Inactive Publication Date: 2007-08-15
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A possible problem with the manufacture of such composite articles is that a secure connection of the elastic components may be difficult to achieve and / or maintain
However, such additional processing increases the production cost of the elastic laminate backing
Another potential disadvantage of elastic laminated backings is that it is difficult to provide variation in elastic recovery developed in different parts of the backing

Method used

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  • Composite webs with discrete elastic polymeric regions
  • Composite webs with discrete elastic polymeric regions
  • Composite webs with discrete elastic polymeric regions

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0225] Composite webs of the present invention were produced using equipment similar to that shown in Figure 8A. A single-screw extruder with a diameter of 51 mm was used to deliver molten polymer (ENGAGE 8400, DupontDow Elastomers) comprising ultra-low density polyethylene to the neck tube at a melt temperature of approximately 207°C. The neck was positioned such that a thick stream of molten polymer was extruded vertically downward onto the outer surface 32 of an oil-heated steel transfer roll 30 having a diameter of 23 cm. Using a computer-controlled milling machine, the outer surface of the transfer roll is machined to have groove-like grooves parallel to the axis of the roll, the grooves are 25.4 cm long, 2.3 mm wide, and 1.3 mm deep, with the distance between the grooves Center-to-center spacing is 1.0 cm. After the grooves are filled or partially filled with molten polymer, a brass doctor blade with a thickness of 1.5 mm at the point of contact with the roll, acting on...

example 2

[0227] A scrim was produced in a similar manner to that described in Example 1, except that SEBS block copolymer elastomer (KRATON G-1657, Shell Chemical) was used as the molten polymer. The temperature of the molten polymer was 249°C and the transfer roll was at 246°C. A nip pressure of 53N / lineal cm was used. Each transferred region of molten polymer has a basis weight of 529gram / m 2 . The cumulative basis weight of the transferred polymer domains on the nonwoven substrate was 72 gram / m 2 .

example 3

[0229] A web was produced in a similar manner to that described in Example 1, except that the temperature of the molten polymer was 223°C and the transfer roll was at 218°C. The temperature of the backup roll was 38°C. A nip pressure of 88N / lineal cm was used. Each transferred region of molten polymer has a basis weight of 449gram / m 2. The cumulative basis weight of the transferred polymer domains on the nonwoven substrate was 61 gram / m 2 .

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Abstract

Composite webs and methods and systems for manufacturing composite webs including a substrate with one or more discrete polymeric regions located thereon are disclosed. At least some of the discrete polymeric regions are formed of an elastomeric thermoplastic composition that is transferred to the substrate in depressions formed on a transfer roll. The discrete elastomeric polymeric regions can be used to provide elasticity to a substrate that is not elastic or they may be used to adjust the elasticity of a substrate that is itself elastic.

Description

technical field [0001] The present invention relates to a method of making a composite web comprising one or more discrete polymeric regions of an elastomeric component. Background technique [0002] The manufacture of articles having elasticity, ie the ability to at least partially return to their original shape after moderate elongation, may be desirable for a number of reasons. For example, elastic can be used in fastening systems for items such as garments (eg, diapers, training pants, tunics, etc.). Elasticity in clothing provides what is known as a dynamic fit, the ability to stretch and recover in response to the movement of the wearer. [0003] Elasticity can also be used in other applications. For example, some fasteners provide a more secure connection if the fastener maintains the tension that can be provided by stretching the fastener and relying on restoring forces to provide the desired tension. In other cases, the elasticity can allow for easy adjustment of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/00B29C43/22B05C1/08B32B5/04A44B18/00A61F13/62B29C43/28B32B3/08B32B5/26B32B25/10B32B37/15D04H13/00
CPCB32B5/26Y10T24/2792B32B5/04D04H13/002A44B18/0003Y10T428/24017B29L2031/729A61F13/62B32B3/08B29C43/28B29C43/222A61F13/622
Inventor 拜伦·M·杰克逊布拉德利·W·伊顿利·E·伍德斯科特·J·图马
Owner 3M INNOVATIVE PROPERTIES CO