GB1061275A - Creation of Inventions and Patents with Artificial Intelligence

GB1061275A – Heat-sealable paperboard containers and method for their production
– Google Patents

GB1061275A – Heat-sealable paperboard containers and method for their production
– Google Patents
Heat-sealable paperboard containers and method for their production

Info

Publication number
GB1061275A

GB1061275A
GB1209464A
GB1209464A
GB1061275A
GB 1061275 A
GB1061275 A
GB 1061275A
GB 1209464 A
GB1209464 A
GB 1209464A
GB 1209464 A
GB1209464 A
GB 1209464A
GB 1061275 A
GB1061275 A
GB 1061275A
Authority
GB
United Kingdom
Prior art keywords
hydrocarbons
weight
paraffin
vinyl acetate
wax
Prior art date
1963-03-28
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.)

Expired

Application number
GB1209464A
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.)

ST Regis Paper Co

Original Assignee
ST Regis Paper Co
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.)
1963-03-28
Filing date
1964-03-23
Publication date
1967-03-08

1964-03-23
Application filed by ST Regis Paper Co
filed
Critical
ST Regis Paper Co

1967-03-08
Publication of GB1061275A
publication
Critical
patent/GB1061275A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL

B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper

B65D5/42—Details of containers or of foldable or erectable container blanks

B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer

B—PERFORMING OPERATIONS; TRANSPORTING

B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL

B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form

B65D65/38—Packaging materials of special type or form

B65D65/42—Applications of coated or impregnated materials

Abstract

Wax coating compositions comprise 5 to 20% by weight of a copolymer of ethylene and vinyl acetate, methyl, ethyl acrylate having an acetate or acrylate content between 20 and 30% by weight of the copolymer, 10 to 20% of microcrystalline paraffin wax having a melting point between 160 DEG and 180 DEG F., 1 to 5% high pressure, low density polyethylene having a molecular weight between 1500 and 7000, and 55 to 85% by weight of an intermediate fraction of paraffin wax, the major portion thereof consisting of normal paraffin hydrocarbons, e.g. 60 to 75% by weight, and the remaining portion consisting of branched chain, monopolycyclic saturated (paraffin) and unsaturated (aromatic) hydrocarbons. A preferred paraffin wax is one which contains 66% normal paraffin hydrocarbons, 20% branched chain paraffin hydrocarbons, 10% monocyclic and 3% polycyclic saturated hydrocarbons and 1% aromatic hydrocarbons. The preferred ethylene-vinyl acetate copolymer contains between 27 and 29% vinyl acetate.ALSO:Wax coating compositions comprise 5 to 20% by weight of a copolymer of ethylene and vinyl acetate, methyl, ethyl acrylate having an acetate or acrylate content between 20 and 30% by weight of the copolymer, 10 to 20% of microcrystalline paraffin wax having a melting point between 160 DEG and 180 DEG F., 1 to 5% high pressure, low density polyethylene having a molecular weight between 1500 and 7000, and 55 to 85% by weight of an intermediate fraction of paraffin wax, the major portion thereof consisting of normal paraffin hydrocarbons, e.g. 60 to 75% by weight and the remaining portion consisting of branched chain, monopolycyclic saturated (paraffin) and unsaturated (aromatic) hydrocarbons. A preferred paraffin wax is one which contains 66% normal paraffin hydrocarbons, 20% branched chain paraffin hydrocarbons and 1% aromatic hydrocarbons. The preferred ethylene-vinyl acetate copolymer contains between 27 and 29% vinyl acetate.ALSO:A paperboard container blank adapted to be heat-sealed along at least one overlapping portion has on the outer surface a smooth coating of a wax-containing, moisture barrier and heat-sealing coating composition, and on the inner surface at least in the sealing area or areas thereof a continuous coating of the said composition with small, outwardly projecting, randomly distributed protuberances. The coating on the inner surface may be in the form of a pattern (Fig. 4 not shown). The outer coated surface may be glossy, and the protuberances of the inner coated surface may have varied cross section, may be closely adjacent to and occasionally merged with each other and have a height between 0.00116 and 0.00508 centimeter above the base surface of the coating. The coated inner surface may contain a plurality of score lines projecting outwardly from the inner surface in any form e.g. as arcuate, intersecting or randomly disposed lines. The scoring is accomplished before the coating is applied. The coating composition may be applied in liquid form and whilst the coatings are still in flowable condition the coated blank may be passed through a nip formed between a doctor blade and the surface of a rotating pile fabric-covered roll, and cooled at a rate to congeal the coatings on both surfaces in the forms imparted thereto. The wax coating compositions may comprise 5 to 20% by weight of a copolymer of ethylene and vinyl acetate, methyl, ethyl acrylate having an acetate or acrylate content between 20 and 30% by weight of the copolymer, 10 to 20% of microcrystalline paraffin wax having a melting point between 160 and 180 DEG F, 1 to 5% high pressure, low density polyethylene having a molecular weight between 1500 and 7000, and 55 to 85% by weight of an intermediate fraction of paraffin wax, the major portion thereof consisting of normal paraffin hydrocarbons e.g. 60 to 75% by weight and the remaining portion consisting of branched chain, monopolycyclic saturated (paraffin) and unsaturated (aromatic) hydrocarbons. A preferred paraffin wax is one which contains 66% normal paraffin hydrocarbons, 20% branched chain paraffin hydrocarbons, 10% monocyclic and 3% polycyclic saturated hydrocarbons and 1% aromatic hydrocarbons. The preferred ethylene-vinyl acetate copolymer contains between 27 and 29% vinyl acetate. In Fig. 5 (not shown), a butter or oleo-margarine container blank has an end flap 17 scored to present raised lines 18 on the coated inner surface along with corresponding depressions 18a in the outer surface, the protuberances occuring randomly over the flap both on the raised portions 18 and in the spaces between them.

GB1209464A
1963-03-28
1964-03-23
Heat-sealable paperboard containers and method for their production

Expired

GB1061275A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US26878763A

1963-03-28
1963-03-28

Publications (1)

Publication Number
Publication Date

GB1061275A
true

GB1061275A
(en)

1967-03-08

Family
ID=23024480
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB1209464A
Expired

GB1061275A
(en)

1963-03-28
1964-03-23
Heat-sealable paperboard containers and method for their production

Country Status (3)

Country
Link

DK
(1)

DK107270C
(en)

GB
(1)

GB1061275A
(en)

SE
(1)

SE315153B
(en)

1964

1964-03-18
SE
SE334964A
patent/SE315153B/xx
unknown

1964-03-23
GB
GB1209464A
patent/GB1061275A/en
not_active
Expired

1964-03-25
DK
DK155064A
patent/DK107270C/en
active

Also Published As

Publication number
Publication date

DK107270C
(en)

1967-05-08

SE315153B
(en)

1969-09-22

Contact information