Multilayer retardation film and method for producing same
US-2015378079-A1 · Dec 31, 2015 · US
Stretched film, process for producing the same, and liquid crystal display device
US8993075B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993075-B2 |
| Application number | US-74490908-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 12, 2008 |
| Priority date | Nov 27, 2007 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
Official abstract text for this publication.
A stretched film comprised of a “B 1 ” layer comprised of a thermoplastic resin 1, an “A” layer comprised of a styrene-based resin, and a “B 2 ” layer comprised of a thermoplastic resin 2 stacked in that order and having a width of over 1000 mm, wherein a ratio of the “A” layer in the stretched film is 45 wt % or less, an average value of an orientation angle θ with respect to a width direction across at least 1000 mm of the width direction is 0°±1°, a variation in orientation angle θ is 0.5° or less, and a value of an Nz coefficient is −3.5 to −0.5 in range.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing a stretched film comprised of a “B” layer comprised of a methacrylic resin 1, an “A” layer comprised of a styrene-based resin, and a “B 2 ” layer comprised of a methacrylic resin 2, stacked in that order, simultaneously biaxially stretched, and having a width of over 1000 mm, comprising a step of heat fixing at a heating zone arranged at an oven outlet of a simultaneous biaxial stretching apparatus with heat fixing temperature th…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8993075B2 cover?
- A stretched film comprised of a “B 1 ” layer comprised of a thermoplastic resin 1, an “A” layer comprised of a styrene-based resin, and a “B 2 ” layer comprised of a thermoplastic resin 2 stacked in that order and having a width of over 1000 mm, wherein a ratio of the “A” layer in the stretched film is 45 wt % or less, an average value of an orientation angle θ with respect to a width direction…
- Who is the assignee on this patent?
- Takizawa Tadashi, Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification B29C55/023. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).