DE2228208A1 - PACKAGING MATERIAL AND METHOD FOR MANUFACTURING IT - Google Patents

Description

PATENTAN WALTS OFFICE ThOMSEN - TlEDTKE - BüHLW ~

TEL. (M11) 530211 TELEX: 5-24303 topat

6302 «

PATENT LAWYERS Munich: Frankfurt / M .: Dipl.-Chem. Dr. D. Thomsen Dipl. - Ing. W. Welnkauff Dipl.-Ing. H. Tiedtke (Fuohihohl 71)

Dipl.-Chem. Q. Bühling Dipl.-Ing. R. Kinne Dipl.-Chem. Dr. U. Eggers

8000 Munich 2 KalMr-Ludwig-Platz β June 9, 1972

Imperial Chemical Industries Limited
London, UK

Packaging materials and procedures too
its manufacture

The invention relates to packaging material.

In pending UK patent applications 53265/69, 27068/70, 55241/70, 552 * 12/70, 55243/70, 61324/70, 61325/70, 61326/70, 12336/71 and 28206/71 are processes for the production of sheet materials or sheet materials with Plush surface described.

J ₀ . The one used according to the invention, with a plush surface

oo provided web material consists of a base web that is semi- *** rigid or rigid, preferably flexible, continuous- ^ is borrowed, porous or perforated and on at least one

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their surfaces have a plush made of a multitude of fibers or pibrils made of synthetic polymeric material consists, which preferably have an average length of the order of 1 to 20 mm. ·

It has been found that plush-surfaced products of the aforesaid processes, in particular products with a dense plush made of fibers with an average length greater than 5 " mm and preferably greater than 10 mm and similar plush-surfaced products other than materials for mechanical shock absorption and for thermal Insulation are useful, for this purpose they are processed into packaging bodies, e.g., bags, envelopes, cartons, dividers and the like, these bodies being shock-absorbing and heat-insulating.

The invention provides a packaging material that provides mechanical and / or thermal insulation and of one with a plush surface provided flat material, which has a base web, which on at least one of its surfaces comprises a plush having a plurality of fibers or pibrils of synthetic polymeric material.

One embodiment of the packaging material has Shape of a bag or sack, which consists of the flat materials provided with a plush surface.

Preferably, the 209882/064 / , which is provided with a plush surface,

Flat material Part of a layer structure. This can be e.g. • obtained by placing a second on the surface of the pluses Applies flake material made of suitable material; this second flake material can itself have a plush surface, wherein the plush is directed towards or away from the first flake material.

The second flake material can e.g. B. with the help of a suitable adhesive on the plush surface Flaehm material can be glued on or secured by (where the plush is thermoplastic) by making the plush fibrils softened by heat or solvent and adhered to the second flake material; alternatively or additionally, the second Flaehm material should be treated so that it is attached to the plush surface provided flake material sticks, z. B. by melting it, provided it is a thermopTS table. It is not essential that the second flake material is adhered over a large area to the flake material provided with a plush surface; so can it may be advantageous to glue the second flake material to the plush product only at intervals, e.g. B. at limited Places or along lines, e.g. along the edges of the flat materials. Where the plush made of thermoplastic material and gluing with the help of local heat welding takes place in which the polymer, the plush-forming material, is melted and pressed against the second flake material, in order for it to adhere to this, such a connection results in the local collapse or compression of the plush, i. e. there, vio the softening of the plush with subsequent sticking

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ORIGINAL

occurs, but this collapse remains localized so that general collapse of the plush does not occur. The laminated body obtained in this way has two essentially continuous flat materials or layers with one bonded Interlayer made from a plurality of fibrils adhering to at least one of the continuous sheet materials.

In one method of manufacturing packaging material with a layered structure, two pieces are made from with Flat material provided with a plush surface is folded or a single piece is folded over so that two plush areas are in contact with each other with some or all of the edges sealed together to form a sheet material to obtain, which has a plush double layer, which is bordered between two outer flat materials. Such Laminates have better cushioning and insulating properties than individual materials with a plush surface, whereby no plush surface is exposed to the outside that is dirty or can get damp. They can be processed into bags, envelopes, cardboard linings or the like using known techniques will. So z. B. Cut and fold pieces of material (with or without sealing along the edges) and through Adhesives, adhesive tapes, staples, etc. are connected to one another. If the outer flat materials are made of heat-weldable Are made of plastic material, the pieces can be connected by hot welding between the outer and outer flat material will. Alternatively, heat welding properties of the polymeric material that makes up the plush can be used.

There have previously been methods of making plush-surfaced sheet materials for use mentioned as packaging material according to the invention, d. H. such methods as described in the previous pending patent applications are described. Particularly preferred are those processes which have the working steps that one a softened or heat softenable fiber-forming material between the base sheet and a heated surface, the base sheet against the softened polymeric material and the heated surface holds (optionally by pressure from a resilient surface), causing the polymeric material is connected to the base sheet and the polymeric material adheres to the heated surface, that the base sheet and peel the polymeric material from the heated surface to form the pibrils, fibers, or the like, so that the The surface of the base web facing away from the heated surface cools and the fibrils, fibers or flakes formed in this way or loosen tufts from the heated surface.

Preferred fibril-forming polymeric materials used in the manufacture of a plush surface Product can find use in the invention are polymers, e.g. B. Polymers and copolymers of Ethylene, propylene, butadiene, vinyl chloride, vinyl acetate, vinylidene chloride, acrylonitrile and styrene and condensation polymers, ζ. B. polyamides and polyesters such as glycols and aromatic Dicarboxylic acids. Mixtures of fiber-forming polymeric materials can also be used.

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Examples of specific thermoplastic polymeric materials that can be used are e.g. B. polyethylene, Polypropylene, nylon, polyethylene terephthalate and polyvinyl chloride,

For reasons of cost, the particularly preferred polymeric material is a low density polyethylene or a blend of low density polyethylene with bituminous materials or thermoplastic waste.

The pending British patent applications 12336/71 and 28206/71 describe the manufacture of plush topped fabrics provided products, which have a plush made of thermosetting polymeric material. The ones with a plush surface Flat materials of such design can be used as packaging material as described.

The plush is preferably dense (i.e. it has a large number of fibers or pibrils per unit area), firm and resilient, the actual density, strength and resilience of the plush depending ^ on the intended use of the packaging material is selected. Using the aforementioned procedures at the correct Choosing suitable materials, the production of plush with suitable properties is possible in a wide range.

The base sheet can be made of any suitable material. They can be natural or synthetic Material. As an example of a natural material

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can be called regenerated cellulose (i.e., "cellophane"). Synthetic materials from which the base sheet can be made include e.g. B. such materials as before have been mentioned as being suitable for use as polymeric materials for making a plush.

Other materials that make up the base or the Sheet material that can be made include metal, e.g. B. aluminum, braids or foils, woven or non-woven. Textiles and laminates made up of two or more layers. Preferably however, the base sheet consists of paper that z. B. Newsprint, light or heavy wrapping paper, packing paper or flexible cardboard. There should advantageously be a good bond between the polymeric material and the sheet material exist; Large-area glossy paper may not be suitable as the flat material, as the binding or adhesion between the high-gloss surface and the polymeric material is difficult. Papers that are only on one side are glossy, can be suitable, provided that the polymeric material is applied to the gloss-free side. Papers in Layered or coated papers can be used, especially a paper that is on one or both sides with A polymeric material is coated, eliminating the need for the separate supply of polymeric material in the Pluschbildungverfahren could be eliminated. The usage Paper with a polymeric coating on the side facing away from the plush can also be advantageous in this respect be than they are the packaging material water resistance

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gives or as it provides desirable aesthetic or other properties. In general, however, this is used for the formation of the packaging material material used depending on the intended use. So could z. B. for packaging material, that has to carry heavy objects, a loose material cannot be used.

Particularly suitable for certain areas of application can have packaging material that comprises flat material, the consist of a plush surface, which is attached to a base sheet of foam, preferably polyurethane foam (the rigid or is preferably flexible), the foam having a thickness of 1 to 10 mm or more.

The invention is explained in more detail below with reference to schematic drawings of several exemplary embodiments.

1 shows a perspective representation of a material provided with a plush surface;

Fig. 2 shows a plan view of a flat blank for forming the material of Fig. 1;

FIG. 3 illustrates the type of folding of the blank according to FIG. 2;

FIG. J is a sectional view taken along line B'-B in FIG Fig. 3J

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Fig. 5 shows a diagrammatic partial representation

packaging body produced according to the invention;

Fig. 6 shows a casing according to the invention in perspective;

Fig. 7 shows a diagrammatic representation of a tube which is formed from a casing according to the invention Laminate sheet is formed;

FIGS. 8 and 9 show, in a view and in a diagrammatic representation, dividers for e.g. B. Bottle crates;

10 and 11 show such dividers in plan view structure according to the invention;

FIG. 12 shows a diagrammatic representation

Bags made of packaging material according to the invention;

FIG. 13 shows a sectional view along the line DD ¹ in FIG. 12.

1 shows a diagrammatic representation of a material provided with a plush surface and made from a base web and a plush 2.

Fig. 2 shows a plan view of a flat blank which has already been cut to shape from a material according to Fig. 1, AA ¹ is a Paltlinie around which the blank in the shape

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can be folded according to Fig. 3 (a section along the line BB ¹ is shown in Fig. 4), which then along the line CC
can be folded. If the plush consists of thermoplastic material, it can expediently be heat-welded in order to glue the sides of the material to form a bag according to FIG. 5
to reach. In Figures 3 and 4, areas 2 are exposed plush surfaces, while area 3 is a weld line where the plush has collapsed. The areas 4 in
Fig. 5 are also weld lines.

Of course, the product according to FIG. 3 does not have to be folded any further, so that a simple plush-covered bag is obtained by simply adding a third side
closes, but one or both of the above areas 2 provided with plush surface are not necessary.

A bag-shaped container, as it is obtained according to FIGS. To 5, can be used as a heat insulating container ζ. Β. for frozen food, ice cream, etc. or for hot food such as B. Sehnell serving foods can be used. Can also be used as a cushioned container, e.g. B, possible as envelopes for packing and transporting books or the like; the plush has a suitable thickness and resiliency, even fragile objects such as, for example, glass bottles, sample vials, watches, electronic and other engineering equipment can be packaged. Cases can be provided with a flap or tongue and a closure device of a suitable type, as illustrated, for example, in FIG

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which is a closable padded sleeve.

In another embodiment, has a pouch or a shell walls which have a layer structure, the walls having an inner and an outer sheet material between them which is a plush. The inner flat material or the inner layer consists of thermoplastic material, wherein the components of the laminate by hot welding together are connected, thereby through. Melting of the thermoplastic flat material and / or the plush - if this is also thermoplastic - the flat materials are connected to one another. The materials used must of course be compatible, d. H. they should be connectable to one another by V / arm welding.

One method for making a bag with such a thermoplastic liner component is disclosed explained below:

A four-ply laminate was produced, which was made up of two rectangular pieces 0.075 mm thick Low density polyethylene flat material between two rectangular pieces of the same dimensions made of one with a plush surface provided flat material were inserted, the plush extending in the direction of the polyethylene flat material. The flat material with a plush surface was strong packing paper that was used as a coating on one of its Surfaces a multitude of fibrils from low density

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«= 12 -

Polyethylene wore, with the fibrils a medium length im Range of 3-6 mm. Around the three edges of the laminate A continuous weld was formed by heat and pressure so that the plush melted and bonded with the polyethylene liner connected, leaving a fourth edge open to allow an object to be inserted between the polymeric flat materials to allow. The welding can of course also be carried out after the object has been inserted between the flat materials take place, wherein the welding pattern can be such that the object is thereby held between the flat materials will.

In an alternative method, a four-ply Laminated body formed as described above, an object is inserted between the polymeric flat materials and there are the four layers or plies with one another in a localized area along the entire outer circumference of the laminate welded. In this way the object is enclosed in an airtight and watertight envelope.

In another method, each of the walls of the bag is separated by welding a polymer sheet together and a plush-surfaced sheet along localized areas. Two such walls which are on top of each other and in which the polymeric flat materials are next to each other, are in localized Areas preferably welded to one another around a substantial portion of the wall circumference. Again becomes a part

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the circumference of the walls is not welded, so that an object can be inserted into the envelope.

The packaging according to the invention can take other forms than those of bags or envelopes, for example the form of cylindrical tubes which can be used to enclose hot tubes or holders for glass bottles or the like. Fig. 7 shows a. such a pipe which is lined with a pipe made of a flat material obtained as described above in a layered construction. Both in the form with a plush surface or, preferably, in the form of a double layer with enclosed plush, the material according to the invention can be used as a "divider for dividing boxes or cartons which are intended to contain a number of bottles, glasses or other fragile objects. Bottle dividers are normally made by assembling a number of pieces of cardboard or other rigid material in the shape shown in Figure 8 and engaging the slots to give the structure shown in Figure 9. Bottle dividers can be made from Material provided with a plush surface can be produced which is combined so that the base sheet lies on the base sheet, so that the structure according to Fig. 10 is obtained with an outer plush surface. Alternatively, material with an inner plush layer and two outer continuous sheets can be used. The edges are advantageous of the laminate heat-absorbing welds. The structure is shown in plan view in Fig. 11 are designated _t wärmeverachweißten wherein the edges 5,

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In the following, further examples are explained in which the production of the plush surface Materials is explained. A sheet of brown wrapping paper - 90 gnT was placed in a Kodak 15 TC gloss machine with a Hot roll of 150 ° C promoted and it was at the same speed between the paper and the hot roll one Layer of polyethylene film (two layers with a thickness of 50 μm each) conveyed. The contact time between paper and film on the hot roll was approximately 30 seconds; during this time the paper and film were kept in contact with the hot roller, namely under a pressure that is applied with the help of an endless belt made of resilient material became. The paper web was peeled off the hot roll and the side closest to the hot roll was applied Directed air jet. The product was a flat material made of paper with a soft plush made of polyethylene fibrils attached to it a length of about 5 mm was glued.

A flat material web was formed into a bag by the method explained with reference to FIGS. 2 to 5.

A quilted or lined product with the above layer structure was obtained in the following manner:

It was a flat material made of woven nylon textile material with a plush made of low-density polyethylene fibers a mean length of 1.5 cm folded so that the fibers were trapped between the nylon sheet, wherein

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the edges were heat welded to make a sandwich body to obtain, which had two outer flat material pieces made of nylon with an intermediate layer of polyethylene plush.

Welding the polyethylene plush liner along intersecting lines produced a product that had the typical appearance of a quilted product. This welding has been accomplished in the way that one clenched between the laminate plates, which were heated to a temperature of about 120 ⁰ C. The panels had a pattern of cooperating ribs on both surfaces, which resulted in the line-wise welding of the nylon sheets by melting the polyethylene.

The quilted product could be used for furniture coverings, clothes, bed cover sheets, etc. in addition to the type of use as packaging or protective material.

In a further embodiment, an insulating bag was produced with walls, each made of a laminate consisted of two outer flat material parts made of HD polyethylene, which were separated by a plush interlayer were separated, the pouch being formed by folding over the laminate as described in FIG. In an alternative embodiment, the laminate was Shaped into a tube and closed with a longitudinal seam. Sections of bags of suitable length were then formed from the

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The tube was cut off and the tube was flattened and locked to close the bottom.

Claims (14)

Claims (1.j packaging material, marked with
Flat material provided with a plush surface and consisting of a base web (1) of which at least one surface bears a plush,
which has a plurality of fibers or fibrils made of synthetic polymer material. 2. Packaging material according to claim 1, characterized in that the fibers or fibrils have a length of 1 to 20 mm, preferably 5 to 20 mm. 3. Packaging material according to claim 1 or 2, characterized in that the fibers or fibrils are thermoplastic Include polymer. 4. Packaging material according to claim 3, characterized in that that the polymer is polyethylene. 5. Packaging material according to any one of the preceding claims, characterized in that the base web made of paper. 6. Packaging material according to one or more of the preceding claims, characterized in that the flat material provided with a plush surface has the form of a laminate, the fibers or fibrils between a base web and
are bordered by a second sheet material. 9882/0644 7. Packaging material according to claim 6, characterized
characterized in that the second sheet of thermoplastic material beeteht. 8. Packaging material according to one of the preceding claims 5 or 6, characterized in that the components of the laminate are bonded together by heat softening a thermoplastic polymeric component of the laminate are. 9. Packaging material according to one or more of the
preceding claims, characterized in that it is the
Has the shape of a bag. 10. Packaging material according to one or more of the preceding claims, characterized in that it is as
Laminate product is formed which has two flat material components and an intermediate layer made of plush which
Fibers or fibrils are made of thermoplastic material, the flat material components being locally welded by heat
are connected to each other and during the welding process the plush
melted and collapsed. 11. Packaging material according to one or more of the preceding claims, characterized by the use
as a subdivision device. 209882/0644 12. A method for producing a packaging material according to one or more of the preceding claims in the form of a bag or envelope, characterized in that suitably designed and dimensioned flat materials, at least one of which has a plush surface Flat material is laid one on top of the other and connects these flat materials to one another, 13. The method according to claim 11, characterized in that the connection is carried out by a welding process, at by melting a thermoplastic component on one or more of the sheet materials. 14. The method according to claim 11 or 12, characterized in that that one produces a laminate product, suitably designed and dimensioned laminate products Surface superimposed on surface and causes an at least partial circumferential connection of the laminate product. 209fiR? / Fl6 /, £