Check patentability & draft patents in minutes with Patsnap Eureka AI!

Cellulose acylate film, saturated norbornene resin film, and process for producing these

A technology of cellulose acylate, manufacturing method, applied in the direction of flat products, applications, coatings, etc., can solve problems such as film streak failure, and achieve the effect of suppressing streak failure

Inactive Publication Date: 2009-07-22
FUJIFILM CORP
View PDF85 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when producing a cellulose acylate film or a saturated norbornene-based resin film, there is a problem that streaks appear in the formed film.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cellulose acylate film, saturated norbornene resin film, and process for producing these
  • Cellulose acylate film, saturated norbornene resin film, and process for producing these
  • Cellulose acylate film, saturated norbornene resin film, and process for producing these

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0188] Synthesis example 1 (synthesis of cellulose acetate propionate)

[0189] 150 g of cellulose (hardwood pulp) and 75 g of acetic acid were taken in a 5 L separable flask with a reflux device as a reaction vessel, and vigorously stirred for 2 hours while heating in an oil bath adjusted to 60°C. The cellulose subjected to such a pretreatment is swollen and pulverized into flakes. The reaction vessel was placed in an ice-water bath at 2°C for 30 minutes to cool.

[0190] Separately, a mixture of 1545 g of propionic anhydride and 10.5 g of sulfuric acid was prepared as an acylating agent, and after cooling to -30° C., it was added at once to the reaction container containing the pretreated cellulose. After 30 minutes had passed, the temperature of the external device was gradually raised, and after 2 hours had passed after the addition of the acylating agent, the internal temperature was adjusted to 25°C. Cool the reaction container with an ice-water bath at 5°C, adjust the...

Synthetic example 2

[0192] Synthesis example 2 (synthesis of cellulose acetate butyrate)

[0193] 100 g of cellulose (hardwood pulp) and 135 g of acetic acid were taken in a 5 L separable flask with a reflux device as a reaction vessel, and heated in an oil bath adjusted to 60° C. for 1 hour. It was then heated with an oil bath adjusted to 60° C. while stirring vigorously for 1 hour. The cellulose subjected to such a pretreatment is swollen and pulverized into flakes. The reaction vessel was placed in an ice-water bath at 5°C for 1 hour to sufficiently cool the cellulose.

[0194] Separately, a mixture of 1080 g of butyric anhydride and 10.0 g of sulfuric acid was prepared as an acylating agent, and after cooling to -20° C., it was added all at once to the reaction vessel containing the pretreated cellulose. After 30 minutes, the peripheral temperature was gradually raised to 20° C. and reacted for 5 hours. The reaction container was cooled with a 5° C. ice-water bath, and 2,400 g of 12.5% ​​b...

Embodiment

[0499] 1. Film production of cellulose acylate film or saturated norbornene-based resin film

[0500] (1) Preparation of cellulose acylate

[0501] prepare Figure 5 The cellulose acylate described in Table 1. Sulfuric acid (7.8 parts by weight per 100 parts by weight of cellulose) was added as a catalyst, carboxylic acid as a raw material of an acyl substituent was added, and an acylation reaction was performed at 40°C. At this time, the type and degree of substitution of the acyl group are adjusted by adjusting the type and amount of the carboxylic acid. Moreover, aging at 40 degreeC after acylation was performed, and the sample was prepared (the degree of polymerization was lowered by prolonging aging time). The degree of polymerization of the cellulose acylate thus obtained was determined by the following method.

[0502] (Polymerization Determination Method)

[0503] Accurately weigh about 0.2 g of completely dry cellulose acylate, and dissolve it in 100 ml of a mixe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
angle of reposeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-quality cellulose acylate film and saturated norbornene resin film which are produced by a melt film formation method and can be inhibited from having steak failures. Also provided is a process for producing the cellulose acylate film or the saturated norbornene resin film. The process, which is for producing a cellulose acylate film (12) or a saturated norbornene resin film, comprises melting a cellulose acylate resin or saturated norbornene resin with an extruder (22), feeding the molten resin to a die (24) through a piping (23), and ejecting the melt in a sheet form from the die (24) onto a cooled support (26) which is running or rotating to thereby cool and solidify the sheet. Thus, a cellulose acylate film (12) or saturated norbornene resin film is formed. In the process, a static mixer (27) is disposed in the piping (23) and the molten resin flowing in the piping (23) is statically stirred.

Description

technical field [0001] The present invention relates to a cellulose acylate film, a saturated norbornene-based resin film, and a method for producing them, and more particularly to the production of a cellulose acylate film and saturated norbornene with a quality preferable for liquid crystal display devices by a melt film-forming method A resin film technology. Background technique [0002] Cellulose acylate film or saturated norbornene-based resin film can be obtained by melting raw resin pellets (pellet) with an extruder, extruding the molten resin into a sheet form from a die, and cooling it on a cooling drum (drum). , and then obtained by exfoliation (for example, refer to Patent Document 1). Next, by stretching the cellulose acylate film or the saturated norbornene-based resin film in the longitudinal (length) direction and the transverse (width) direction, in-plane retardation (Re) and thickness direction retardation (Rth ), used as a retardation film of a liquid cr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/14C08J5/18G02B1/11G02B5/30G02F1/13363B29K1/00B29L7/00B29C48/08B29C48/305B29C48/525B29K45/00C08F32/08C08G61/08
CPCB29K2001/00B29C47/687B29C47/38B29K2001/12B29C47/0021B29K2105/256B29C47/6012C08J2365/00B29C47/06B29C47/8845G02F1/13363C08J5/18B29C47/14C08J2301/10B29C48/08B29C48/18B29C48/305B29C48/395B29C48/694B29C48/914B29C48/9165B29C48/917B29C48/525G02B1/11G02B5/30
Inventor 大岁正明
Owner FUJIFILM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com