Stretched-thinned film comprising low crystallinity polymers and laminates thereof
A low crystallinity, polymer technology, applied in thin material processing, synthetic resin layered products, layered products, etc., can solve problems such as weak tensile strength, high manufacturing cost, film breakage, etc.
Inactive Publication Date: 2000-01-26
KIMBERLY-CLARK WORLDWIDE INC
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When the tensile strength is weak, the film will break with a weaker force. In order to prevent breakage, the film must have a larger thickness, which means higher manufacturing costs.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0051] Rexene 13S25A replaced Exxon 3445 in the core layer. When the blend enters the extrusion system, the blend contains many unmelted, but tiny, white gels. Turning up the temperature profile in the core eliminated much of the gel, although a few small pieces of gel remained. The resulting film still contained more tailing gel than the control film.
Embodiment 2
[0053] Shell 6D43 replaces Exxon 3445 in the core layer. Films made with this blend had better overall dispersion of TiO2, but still had higher levels of tailing gel than the control film. The overall frequency of gels in this film was comparable to Example 1.
Embodiment 3
[0055] Shell WRD60-277 replaces Exxon 3445 in the core layer. Films made with this blend were similar to Example 2 in levels of tailing gel and higher than the control film. However, TiO2 dispersion and film appearance are good.
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Abstract
The present invention relates to thin, elastomeric films made from low crystallinity propylene copolymers having a crystallinity of less than about 30 %. The elastomeric films of the present invention have improved strength in the cross machine direction. The films may be incorporated into laminate materials used in the outer coverings of diapers, training pants, incontinence products and the like.
Description
field of invention [0001] This invention relates to thin, elastomeric films containing low crystallinity polymers and laminates thereof. Furthermore, the invention also relates to a method for producing the film. Background of the invention [0002] This invention relates to low crystalline polymer films and laminates thereof. These materials have a wide range of uses, especially in areas of limited use or disposable items. [0003] Traditionally, this elastomeric film has served as a barrier in limited-use or disposable items. The terms "limited use" and "disposable" mean that an item or part is used only once, or that it is used only a limited number of times before being discarded. Examples of such items include, but are not limited to, surgical or health care items such as hospital drapes and gowns, disposable work clothing such as coveralls and lab coats, and absorbent personal care articles such as diapers, training pants , anti-incontinence clothing, sanitary napk...
Claims
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IPC IPC(8): C08J5/18C08L23/12C08L23/14
CPCC08J2323/14C08L2203/02C08L23/14C08J2323/10C08L23/12C08L23/142C08J5/18C08L2205/02Y10T428/25Y10T428/254Y10T428/269Y10T428/249921Y10T428/249978C08L2666/04A61F13/15B32B27/08B32B27/32C08L23/16
Inventor K·G·赫茨勒R·L·雅各布斯
Owner KIMBERLY-CLARK WORLDWIDE INC