{"id":31256,"date":"2026-10-21T23:45:39","date_gmt":"2026-10-21T15:45:39","guid":{"rendered":"https:\/\/lintyco.nl\/zakvormen-overzicht\/"},"modified":"2026-10-21T23:45:39","modified_gmt":"2026-10-21T15:45:39","slug":"zakvormen-overzicht","status":"publish","type":"post","link":"https:\/\/lintyco.nl\/en\/zakvormen-overzicht\/","title":{"rendered":"Bag Shapes Overview: Eight Shapes and the Machine That Makes Them"},"content":{"rendered":"

The shape of a bag isn\u2019t a matter of fashion but an answer to two questions: what\u2019s inside it, and where it will be placed. Retail requires bags that stand upright and are printed on the front; transportation requires bags that are sturdy and stackable; and powder requires seams that keep the powder contained. This overview describes eight shapes and the best method for creating each one: formed on a vertical form, fill, and seal machine<\/a> or supplied as a preformed bag.<\/p>\n

The Eight Forms<\/h2>\n

Pillow Case<\/strong> \u2014 the basic VFFS design: one back seam plus top and bottom seams; the film forms a cushion around the product. Strong, economical in film use, and the standard for bulk snacks, granules, and powders. The pillowcase<\/a> is produced directly from the film roll.<\/p>\n

3-side seal bag<\/strong> \u2014 flat pouch with three seams, flattened and lightweight: sachets for sauce, samples, and single-use doses. The 3-side seal bag<\/a> is produced on multi-lane sachet machines from the same vertical family.<\/p>\n

4-sided seal bag<\/strong> \u2014 all four sides sealed, completely enclosed: precise doses of powder and liquid in stick and sachet form, the family behind the stick pack<\/a>-line; more on that at 4-sided seal bag<\/a>.<\/p>\n

Doypack<\/strong> \u2014 the stand-up pouch with a gusseted bottom and display panel: shelf display for coffee, snacks, and premium powdered products. It is delivered preformed and filled at the machine for filling pre-made bags<\/a>, or from the roll on a machine with a bottom fold. More about the Doypack<\/a>-his route and his machine.<\/p>\n

Block-bottom bag<\/strong> \u2014 rectangular box bottom, stands on its own and stacks on a pallet: 500 g to 5 kg of animal feed, pellets, flour. The block-bottom bag<\/a> requires heavier film and a machine with bottom forming capabilities.<\/p>\n

Quad Seal Bag<\/strong> \u2014 Four vertical seams keep the bag square and upright: heavy powder that must not sag, often with ventilation in the seams. The Quad Seal Bag<\/a> combines a standing presentation with a strong presence.<\/p>\n

Piping Bag<\/strong> \u2014 bag with a spout and screw-on cap for liquids and sauces: honey, sauces, liquid detergent. The spout bag<\/a> requires a filling station that attaches the spout to the seal.<\/p>\n

Bag with a rear seal<\/strong> \u2014 resealable strip on the back for reuse after opening: coffee packets, cookies, candy. The bag with a rear seal<\/a> combines convenience with a permanent gas barrier.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Form<\/th>\nIs it standing upright?<\/th>\nTypical content<\/th>\nRoute<\/th>\n<\/tr>\n<\/thead>\n
Pillow Case<\/td>\nno<\/td>\nsnacks, granules<\/td>\nVFFS from a roll<\/td>\n<\/tr>\n
3-side seal bag<\/td>\nno<\/td>\nsachets, sauce<\/td>\nmulti-lane sachet machine<\/td>\n<\/tr>\n
4-sided seal bag<\/td>\nno<\/td>\nsticks, doses<\/td>\nmulti-column labeling machine<\/td>\n<\/tr>\n
Doypack<\/td>\nyes<\/td>\ncoffee, premium<\/td>\npre-shaped or bottom pleat<\/td>\n<\/tr>\n
Block-bottom bag<\/td>\nyes<\/td>\n500 g to 5 kg<\/td>\nmachine with bottom forming<\/td>\n<\/tr>\n
Quad Seal Bag<\/td>\nyes<\/td>\nheavy powder<\/td>\npreformed<\/td>\n<\/tr>\n
Piping Bag<\/td>\nyes<\/td>\nliquid with a spout<\/td>\npreformed with a spout station<\/td>\n<\/tr>\n
Bag with a rear seal<\/td>\nno<\/td>\nresealable, dry<\/td>\nVFFS with strip application<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Form Follows Shelf and Product<\/h2>\n

Two approaches to the table. The shelf: items on the supermarket shelf stand upright\u2014doypack, block-bottom, quad. The product: anything that flows, runs, or is heavy dictates the seam construction and the film. The full comparison between preformed and roll-fed packaging is in preformed bags or VFFS<\/a>; you can read the technical side of the story at What is a VFFS?<\/a>.<\/p>\n

Frequently Asked Questions<\/h2>\n

Q: Can a single machine produce all of these shapes?<\/strong><\/p>\n

No, and that\u2019s the point of the table: the pillow-pack family runs on standard VFFS machines, and the sachets run on multi-lane or similar machines; the stand-up pouches require bottom forming or preformed feed. One line covers one family; the families complement each other as described in Automate the packaging line<\/a>.<\/p>\n

Q: What is the least expensive option per bag?<\/strong><\/p>\n

The pillowcase: one back seam plus top and bottom seams, minimal film waste. Every extra pleat, bottom panel, or closure adds to the amount of film used and the number of machine operations\u2014the math is clear film consumption<\/a>.<\/p>\n

Q: What shape should I choose for powder that needs to stand on its own?<\/strong><\/p>\n

The Quad Seal bag: the four seams keep the sides upright, even when filled with 2 to 3 kg. The block-bottom bag works as well, but with finer powders, the Quad Seal bag creates a sleeker silhouette that sells better in retail.<\/p>\n

Related pages<\/h2>\n

pillowcase<\/a> | Doypack<\/a> | block-bottom bag<\/a> | Quad Seal Bag<\/a> | spout bag<\/a> | 3-side seal bag<\/a> | 4-sided seal bag<\/a> | bag with a rear seal<\/a><\/p>\n

\n

Request a technical proposal<\/a> Please specify the product, bag size, and desired output.<\/p>","protected":false},"excerpt":{"rendered":"

The bag shape is determined by the product and the shelf: stand-up pouches for retail, pillow bags for high-volume products, and quad-seal bags for heavy powders. This overview describes eight shapes, including their characteristics and applications, and links each shape to the production method that works best for it\u2014VFFS from a film roll or preformed bags.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"Zakvormen overzicht: acht vormen van kussenzak tot blokbodemzak \u2014 met kenmerken, typische producten en de machine die elke vorm het beste maakt.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","footnotes":""},"categories":[1],"tags":[247,66,246],"class_list":["post-31256","post","type-post","status-publish","format-standard","hentry","category-blog","tag-blokbodemzak","tag-doypack","tag-zakvormen"],"_links":{"self":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/31256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/comments?post=31256"}],"version-history":[{"count":0,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/31256\/revisions"}],"wp:attachment":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/media?parent=31256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/categories?post=31256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/tags?post=31256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}