JPS57129722A - Manufacture of synthetic paper - Google Patents

Manufacture of synthetic paper

Info

Publication number
JPS57129722A
JPS57129722A JP1492281A JP1492281A JPS57129722A JP S57129722 A JPS57129722 A JP S57129722A JP 1492281 A JP1492281 A JP 1492281A JP 1492281 A JP1492281 A JP 1492281A JP S57129722 A JPS57129722 A JP S57129722A
Authority
JP
Japan
Prior art keywords
tubular film
manufacture
unstretched
crosswise
mandrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1492281A
Other languages
Japanese (ja)
Inventor
Yoshiji Ichihara
Katsumi Okuyama
Hiroyasu Mizutani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Petrochemical Co Ltd
Original Assignee
Mitsubishi Petrochemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Priority to JP1492281A priority Critical patent/JPS57129722A/en
Publication of JPS57129722A publication Critical patent/JPS57129722A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • B29C55/285—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation by using internal mechanical means

Abstract

PURPOSE:To manufacture a synthetic paper without faulty appearance due to chalking by biaxially stretching an unstretched tubular film having a specific ratio of yield point strength in the longitudinal direction to that in the crosswise direction along a drawing mandrel while keeping it tubular form. CONSTITUTION:A thermoplastic resin is mixed with 10-80wt% (W) inorganic filler. And, an unstretched tubular film having a ratio (X) of the yield point strength in the longidutinal direction to that in crosswise direction of 90/W<=X<= 240/W, obtained from the load-elongation curves for longitudinal and crosswise directions, measured at stretching temperature, is biaxially stretched along the drawing mandrel of a conical base inserted into the unstretched tubular film while keeping its tubular form by a mandrel stretching method.
JP1492281A 1981-02-05 1981-02-05 Manufacture of synthetic paper Pending JPS57129722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1492281A JPS57129722A (en) 1981-02-05 1981-02-05 Manufacture of synthetic paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1492281A JPS57129722A (en) 1981-02-05 1981-02-05 Manufacture of synthetic paper

Publications (1)

Publication Number Publication Date
JPS57129722A true JPS57129722A (en) 1982-08-11

Family

ID=11874444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1492281A Pending JPS57129722A (en) 1981-02-05 1981-02-05 Manufacture of synthetic paper

Country Status (1)

Country Link
JP (1) JPS57129722A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5591631A (en) * 1978-12-29 1980-07-11 Tokuyama Soda Co Ltd Manufacture of thermoplastic resin tubular biaxial stretching sheet or film containing inorganic filler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5591631A (en) * 1978-12-29 1980-07-11 Tokuyama Soda Co Ltd Manufacture of thermoplastic resin tubular biaxial stretching sheet or film containing inorganic filler

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