NZ628728A - Method of manufacturing flexible plastic film - Google Patents

Method of manufacturing flexible plastic film

Info

Publication number
NZ628728A
NZ628728A NZ628728A NZ62872814A NZ628728A NZ 628728 A NZ628728 A NZ 628728A NZ 628728 A NZ628728 A NZ 628728A NZ 62872814 A NZ62872814 A NZ 62872814A NZ 628728 A NZ628728 A NZ 628728A
Authority
NZ
New Zealand
Prior art keywords
layer
film
primary film
forming
primary
Prior art date
Application number
NZ628728A
Other versions
NZ628728B (en
Inventor
Thomas Grose Frank
Original Assignee
Thomas Grose Frank
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 Thomas Grose Frank filed Critical Thomas Grose Frank
Priority to NZ628728A priority Critical patent/NZ628728B/en
Priority claimed from NZ628728A external-priority patent/NZ628728B/en
Publication of NZ628728A publication Critical patent/NZ628728A/en
Publication of NZ628728B publication Critical patent/NZ628728B/en

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  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A method of manufacturing a flexible plastic film is disclosed. Plant for forming very wide plastic films is expensive and not widely available. If wide sheets are required they may be formed by joining smaller sheets rather than producing the wide sheet in one process step. The method comprises the steps of: i) Forming a length of first primary film (26) by a blown film extrusion process, wherein the first primary film comprises a first layer (26a) and a second layer (26b); ii) Forming a length of second primary film by a blown film extrusion process, wherein the second primary film comprises a first layer (26c) and a second layer (26d) ; and iii) Connecting an outer edge (24) of the second layer of the first primary film to an outer edge of the first layer of the second primary film by a substantially continuous heat sealing operation to form a secondary film having four layers, creating a join (25).
NZ628728A 2014-08-13 Method of manufacturing flexible plastic film NZ628728B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ628728A NZ628728B (en) 2014-08-13 Method of manufacturing flexible plastic film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ628728A NZ628728B (en) 2014-08-13 Method of manufacturing flexible plastic film

Publications (2)

Publication Number Publication Date
NZ628728A true NZ628728A (en) 2016-03-31
NZ628728B NZ628728B (en) 2016-07-01

Family

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Legal Events

Date Code Title Description
PSEA Patent sealed
RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2019 BY FRANK THOMAS GROSE

Effective date: 20180513

RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2020 BY FRANK THOMAS GROSE

Effective date: 20190513

RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2021 BY FRANK THOMAS GROSE

Effective date: 20200514

RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2022 BY FRANK THOMAS GROSE

Effective date: 20210513

RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2023 BY FRANK THOMAS GROSE

Effective date: 20220513

RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 13 AUG 2024 BY FRANK THOMAS GROSE

Effective date: 20230516