JP2002533250A - Method for producing products using natural polymers and those products - Google Patents

Abstract

  (57) [Summary] The method of manufacturing a product comprises introducing a material containing at least a natural polymer such as starch into or through a mold, and heating the material contained in the mold to cause at least cross-linking of the natural polymer, thereby producing at least one first product of the product. By acting on the material composition of one part, the material properties of the first part are different from the material properties of the adjacent part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for producing a product using a natural polymer. Such a production method is known from international patent application WO 95/20626.

[0002]

[Prior art]

In this known method, after introducing the material into the female mold of the platen set, the platen set is closed and heated to a baking temperature for a predetermined time, whereby the natural polymer present in the material is crosslinked in the platen set. Occurs so that the desired foamed foam structure is formed. In this known method, for example, two tray-shaped parts are formed,
These sections are interconnected by relatively thick wall sections of the same composition and structure as the walls of the tray section. This relatively thick wall portion must function as a hinge portion that allows the two tray-type portions to pivot with respect to each other.

[0003]

[Problems to be solved by the invention]

This known method has the advantage that a product with an integral hinge is obtained in a relatively simple manner. However, in such a method, since the product obtained in this manner has a brittle structure, the hinge portion, particularly, the skin-like outer layer is easily split or broken at the time of turning. The other walls of the product have the disadvantage that they are similar. Another major disadvantage of this known method is that it requires a long cycle time, which is disadvantageous both in terms of cost and environment.

In general, it has been argued that for products of the above type, which typically have a foam wall structure, several requirements are set, which, up to now, have been difficult or impossible to be compatible. It is clear that there is. So, for example,
Some parts must be rigid while others must be flexible. For packaging materials, for example, the theory has been applied that some parts are cushioning, while others are shape-preserving and relatively rigid. . Also, for such product parts, for example, moisture resistance, hardness,
Although requirements regarding color, brittleness, heat resistance, etc. can be set, these requirements have so far been difficult to be compatible with requirements imposed on other parts.

[0005] Further, WO 93/05668 describes a method for forming a product from a starch-containing material. In this method, the raw material is heated before being introduced into the mold, so that gelatinization occurs before being introduced into the mold. The desired rigidity is obtained by subsequently cooling the molded product. The resulting product now contains as much water as the boiling starting material. The method of this document does not involve baking of the material, so that a closed skin is not obtained.

[0006]

[Means for Solving the Problems]

It is an object of the present invention to provide a method of the type described above, which overcomes the above-mentioned problems, while retaining the advantages of the known methods. To that end, the method according to the invention is characterized by what is stated in claim 1.

[0007] It has been found that by affecting and changing the material properties of the parts as described above during or after the formation of the basic products, products of the above type can be produced. The present invention provides a basic product, during or after the formation of a product, which adds at least one component to prevent removal of the component therefrom, or, on the contrary, at least a portion of the product upon removal of the component therefrom. Are affected, whereby the component at least partially achieves the desired material properties, or
It is based on the surprising insight that its action is reduced or inhibited.

[0008] The material used in the method according to the invention is preferably biodegradable. As used herein, "biodegradable" shall mean substantially biodegradable and at least substantially recyclable without a particularly high environmental burden. Furthermore, this shall mean at least that it is compostable.

In a first advantageous aspect, a method according to the invention is characterized by what is stated in claim 2.

[0010] By using at least two different materials, the material properties are specifically influenced shortly after the formation of the (base) product, so that at least after the formation, each part of the product has the desired properties. Characteristics can be provided. In this way, one or more parts of the base product can also be made suitable for processing, for example for coating or printing. Such a coating can further influence the properties of the part.

In a further aspect, a method according to the invention is characterized by what is stated in claim 3.

In the method according to the present invention, by making the concentration of the softener in the first part of the product different from that of the other parts, it is possible to obtain a part which is more flexible than the wall part of the adjacent part. I know. In addition, such parts can be relatively easily post-processed as needed, for example, to further increase flexibility. In this way, a product that is partially more flexible than the other parts can be obtained. In a product of the type described in the preamble, for example, by designing the hinge part in the same way as the first part, it is possible to obtain a hinge part that can withstand a relatively large number of pivoting movements without causing breakage. . In addition, this results in a product with high durability while maintaining a favorable appearance for a longer time. In particular, the occurrence of tearing is more effectively prevented.

As used herein, “softener” means at least an agent capable of affecting, and in particular increasing, the mobility of relatively long polymer chains in a product. Shall be. Suitable emollients can be selected depending on the (bio) mass used, in particular on the composition of the natural polymer used therein. Furthermore, the term refers to a process in which more, at least, other softener actives are obtained or maintained in the part.

[0014] Preferably, at least by treating the first part, a relatively high concentration of emollient is obtained / maintained here. In this context, “obtain” shall mean at least the transfer of the softener to the first part, from the other part of the product or by the addition of a softener from outside. In the text, "maintain" means that the amount of the softening agent in the first part does not decrease and the amount of the softening agent in the other part of the product substantially decreases, or A process in which the amount of softener in one part is slower than in the other parts of the product. These combinations are also possible.

Further, at this point, the use of different materials to form each part can also affect other properties, and depending on the location, for example, hardness, It can also affect the properties of the product, such as degradability, coloring, printability or, for example, the flexibility of the closed part. These materials may differ in softeners and other components such as fibers, polymers, additives and the like.

In a further aspect, the invention features the features of claim 5.

With such a method, further hard or brittle parts, such as, for example, cut edges, can be obtained.

In a particularly advantageous manner, a method according to the invention is characterized by what is stated in claim 16.

The advantages achieved by introducing the material into the mold at a pressure above atmospheric pressure are:
If desired, a relatively long and narrow flow path and a relatively large degree of design freedom can be obtained, while at the same time achieving a very suitable density distribution in the product.

In particular, when using the injection molding method to introduce the or each raw material into a mold, a product having desired desirable characteristics can be obtained very economically. Furthermore, by properly arranging the injection openings, the desired advantageous flow pattern can be obtained, and in a simple way, for example, different materials can be introduced from the individual injection openings and each injection opening By adjusting the injection pressure and speed, the desired distribution of the above or each material, a desired density, and the like can be realized. Appropriate introduction devices, locations and pressures, for example, allow for proper placement of fibers and polymers, for example, in the first or other portions, for example, where fibers are relatively long and / or relatively narrow. If so, the fibers themselves can be oriented in the direction of flow. When introducing the above or each material into a nearly closed mold under pressures above atmospheric pressure, produce more products whose introduced material capacity is larger than that which can be placed in the mold cavity of the female mold platen Easier to do. With a relatively large amount of fibers, the tear resistance of the product according to the invention can be further enhanced.

In another advantageous aspect, a method according to the invention is characterized by what is stated in claim 20.

After removal of the product from the mold, by treating at least one first part at least after the product is substantially formed and possibly baked, the other parts can be treated in a relatively simple manner. And the first part having characteristics different from those of the first part.

In a further aspect, a method according to the invention is characterized by what is stated in claim 21.

The advantages achieved by applying a coating comprising at least one active ingredient on or in said material, at least on at least one side of said or each material, are very specific, Alternatively, each component can be introduced into at least a part of the first portion. Therefore, it is possible to easily affect, for example, flexibility, moisture resistance, rigidity, hardness, and / or printability of the portion. In addition, coatings can be used to prevent the appearance of the active ingredient. Such a coating need not contain any active ingredients.

In this method, the coating can be applied, for example, by spraying, ironing or pasting onto the product, or by another suitable method, such as, for example, a labeling molding method. . The coating may be applied to the or each first portion only, or may cover, for example, a wider portion of the product, one or both surfaces of the entire product. With appropriate drying, other properties can also be imparted locally. Thus, for example, by applying an appropriate amount of heat or other type of energy, such as light, to the location of the first portion, excluding other portions of the product, a softener, a softening agent is provided at the location of the hinge portion. Highly reactive components, such as activators or crosslinkers, penetrate into or through the adjacent skin of the product and other material properties are acquired. Alternatively, the properties of the coating, such as curing or drying, are affected at that location. Thus, for example, aqueous coatings or coatings with suitable emollients, in particular solvents, can be used for coating starch-containing products. Heating (of the coating) near a soft part, such as a hinge part, may be weaker than that away from it, so that more water as a softener or softener activator is applied to said part than to other parts. The water can also, if appropriate, be retained there by a coating.

In a further aspect, a method according to the invention is characterized by what is stated in claim 22.

[0027] Before applying the first coating, at least the product portion adjacent to the first portion is covered, so that portions other than the first portion can be easily prevented from coming into contact with the first coating. it can. Thus, the or each active ingredient from the first coating is applied only to the first part, or at least causes a change in its material properties.

[0028] Coating of the portion adjacent to the first portion is preferably achieved by applying thereto a second coating that is at least substantially impermeable to the active ingredient, such as a softener from the first coating. . Preferably, a coating having relatively high hardness and high moisture resistance is used as the second coating. In particular, if the second coating is substantially impermeable to the components, the advantage achieved is that the first coating is easily applied to the product, at least a portion of the second coating and the or each or each first coating. Is to cover the part. This obviously simplifies the application.

Preferably, the first coating is relatively soft and upon movement of the first part,
The tearing of the first coating is at least substantially prevented. The advantage achieved in this way is that even if the core of the first part breaks,
The parts connected to the parts are interconnected by at least a first coating. This effect is also exhibited when only the first coating is used.

In a further advantageous aspect, a method according to the invention is characterized by what is stated in claim 33.

The advantage achieved by providing at least one indentation in the hinge part, at least in the local thin part of said hinge part, is that the bending resistance is reduced at least locally in the hinge part and furthermore the hinge part In each of the outer and inner skins of the part, the pulling and compressing forces on each other decrease as the part connected thereto pivots. In this regard, it is preferred that at least one recess extends over the width, preferably substantially the entire width, of the hinge portion. Also, by providing several recesses, this effect is enhanced.

In a further aspect, a method according to the invention is characterized by what is stated in claim 35.

If the hinge part has the above-mentioned softener concentration, by pressing the appropriate (mold) part, by providing the or each recess, without causing at least skin tearing of the product part, This has the advantage that the deformation of said part of the hinge part is relatively simple. As a result, the closed skin is also retained in and adjacent to the depression.

By including a softener in the hinge portion so as not to flow to a portion adjacent to the hinge portion, a hinge portion having a relatively high softener concentration can be easily obtained and / or obtained.
Or can be held. By using a softener having a relatively high viscosity and / or a relatively large molecular size and / or a low vapor pressure, the softener can be easily prevented from flowing, or at least suppressed. it can. Of course, this can also be achieved using a softener that is held relatively strong by the material of the hinge portion (eg, via adhesion or cohesion).

Prior to and / or during the gelatinization and / or crosslinking of the natural polymer, at least partial compression of the hinge portion causes at least a number of cell walls to be destroyed while other cell formation takes place, For example, it offers the advantage that ever smaller bubbles and higher densities are obtained. Thus, for example, the density and flexibility of the hinge portion will be substantially determined by the hinge portion rather than the intermediate core. Further, according to this method, a hinge portion having higher flexibility than the adjacent portion can be obtained.
In particular, adjusting the nature and / or concentration of the softener and / or blowing agent in the hinge part results in a particularly advantageous, flexible hinge part. It should be noted that the properties of other parts of the product (e.g., local compression) can be adjusted in this or a comparable manner.

The present invention further relates to a product having a foam-like foam structure.
Related to a product characterized by the matters described in 1.

Such a product offers the advantage of being environmentally friendly, while at the same time each part has optimal properties. Furthermore, such products can be produced relatively quickly and easily, so that they can be obtained very economically and preferably from alternative raw materials. The product according to the invention is preferably biodegradable.

In a particularly advantageous embodiment, a product according to the invention is characterized by what is stated in claim 54.

The provision of at least one recess, in particular one or more grooves extending over the width of the hinge part, further increases the flexibility of the hinge part and further defines the boundaries of the hinge. By providing these grooves inside the hinge part, a favorable force distribution at the hinge part is achieved and a favorable appearance is maintained during pivoting.

The invention particularly relates to materials and coatings for use in the methods and products according to the invention, and injection molding equipment therefor.

Further advantageous aspects of the methods, products, uses, coatings and materials are described in the subclaims and are described in more detail in the following description and examples.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION

In the present specification and drawings, the same or corresponding portions are denoted by the same or corresponding reference numerals. The product embodiments shown herein are given by way of example only and should not be construed as limiting.

FIG. 1 is a top plan view of a container 1 according to the present invention in an open state, which is manufactured as a fast food container and is usually called, for example, a “clamshell”. The container 1 comprises a bottom 2 and a cover part 4, which are interconnected by a hinge part 6. The container 1 is manufactured by injection molding or compression molding using a baking mold. These methods are described in more detail below.

The bottom 2 includes a bottom 8 and an outwardly sloping bottom vertical wall 10 extending therefrom.
The cover part 4 includes an upper surface 12 and an outwardly inclined cover vertical wall 14 extending therefrom. The hinge portion 6 connects the bottom vertical wall portion 10a and the adjacent cover vertical wall 14a. Along the free vertical edge of the other three vertical wall sections 14, a closing edge 16 is provided, which will partially cover the bottom vertical wall section 10 when the container 1 is closed. The bottom vertical wall portion 10b opposite the hinge portion 6 is provided with an outwardly extending lip 18. This lip 18 can be fitted in a recess 20 in the closing edge 16 opposite the hinge part 6 when the container 1 is closed.
The hinge part 6, the lip 18 and the closing edge 6 are formed integrally with the bottom part 2 and the cover part 4, all of which have a foamed foam wall structure, as schematically shown in cross section in FIG. 1A. The wall 22 has a relatively large cellular core 24, on either side of which there is a relatively dense skin 26 of relatively small cells.

Such a product is described, for example, in International Patent Application No. PCT / NL96 / 00377. This is described in detail below and is incorporated herein by reference. In FIG. 1A, a coating layer 28 is shown on both sides of the wall 22.
However, as will be described in more detail below, the coating 28 may not be provided on either side of the wall 22, or may be provided on only one side, and may be provided with multiple coating layers on one or both sides. Preferably, the container of FIG. 1 is made of a fully biodegradable, thermally insulating, FDA approved material, and more preferably at least water, fat and / or high temperature, and fast Excellent resistance to situations that can occur when used as food containers. However, this is given by way of example only, and as will be described later with reference to the examples, it is possible to similarly design containers with other properties depending on the desired application. This container has a bottom surface 9 cm long and 8 cm wide. The vertical wall has a height of 3
. It is 5 cm and inclined outward at an angle of 7 °. The wall thickness is about 1.5mm on average
It is.

FIG. 2 is a schematic perspective view of a cup 30 according to the present invention, wherein the cup 30 has a bottom 3.
2 and a vertical wall 46 which extends therefrom and is slightly inclined outward. The vertical wall 46
The free longitudinal edge remote from the bottom is provided with a slightly projecting rim 36. This cup has a height of 9 cm, a bottom diameter of 4 cm and the walls are inclined 4 ° outward.

FIG. 3 is a perspective plan view of the package portion as viewed from above, and the illustrated embodiment is for housing a telephone. This will be referred to as a telephone tray 40 for explanation.
The telephone tray comprises two storage cavities 42, 44, which are connected to each other by a depression 46 and are surrounded by an irregularly shaped vertical wall 48. Although this product is substantially thinner, it may have increased rigidity, for example, by being thicker. Preferably, the cup of FIG. 2 and the telephone tray of FIG. 3 have the same wall cross section as that shown in FIG. 1A and are formed by injection molding or compression molding. However, it is also possible, for example, to manufacture these products from pressed paper.

FIG. 4 schematically shows a female part 60 for producing the container of FIG. 1 by injection molding from at least two materials. For this purpose, a first injector 62 is provided on both sides of the mold part 6a forming the hinge part 6. The injection directions of the two first injectors are transverse to the hinge part. The second injector 64 is mounted on the side opposite to the mold part 6 a forming the hinge part 6 so as to communicate with the mold part 2 a forming the bottom part 2 and the mold part 4 a forming the cover part 4. When using this type, for example,
At the same time, the first material is introduced into the hinge portion forming mold portion 6a by the first ejector 62, and at the same time, the second material is injected into the bottom forming mold portion 2a and the cover portion forming mold portion 4a by the second ejector 64, respectively. I do. As a result, the two materials are fused to each other at the vertical edge of the hinge forming portion 6a. Preferably, the first and second materials have different properties. In particular, the relatively flexible hinge portion can be formed from a first material and cooperate with a coating 28 applied thereto. Also, the bottom 2 and the cover part 4 are formed to be relatively rigid, which can also cooperate with the respectively applied coating 28. Of course, the position where the materials are fused may be changed, and furthermore, different characteristics may be obtained by using several materials, for example, using different materials for the bottom, hinge portion and cover portion. . It is also possible, for example, to introduce the same material at different injection pressures and with different injectors to obtain other product properties.

FIG. 5 schematically shows a part of a female part 70 for forming the cup of FIG.
This mold comprises a first injector 72 leading to the center of the part 36a forming the rim 36 and a second injector 74 leading to the center of the mold part 32a forming the bottom 32. Accordingly, using a mold of the type shown in FIG. 4, 5 or 6, for characteristics other than the hardness (softness) of each part of the product, for example, density, flexibility, etc.
The hardness, looseness, color and even the taste and smell can be adjusted as needed. Also, the surface characteristics of each part of the product can be adjusted, for example, such as smoothness, surface tension, etc., and even products other than the above can be manufactured by a similar method.

FIG. 6 schematically shows a portion of a female part 60 for forming the telephone tray of FIG. This mold includes a first injector 82 that communicates near the center 85 of the bottom 89 and a second injector 84 that communicates near the corner 85 of the mold portion 86a that forms the edge 86. Therefore, as described with reference to FIG. 4, different materials can be used for the corner portion 85 on the one hand and the edge portion 87, the bottom 89 and the vertical wall 48 on the other hand.

In the mold according to the invention, a slide or similar movable part can be used in a suitable manner, for example, to partition the mold at least temporarily. In this case, when using the mold, in each of the two sections divided into such slides, a different material is put at different pressures, or the same material is put at different pressures, at least one material being the other. Remove the slide when it is hardened enough to not mix with the material. Still further, once the slides are removed, the slides can be removed after the materials have been cured, rather than joined together, simply clinging or simply abutting. It can be seen that under normal provisions made so far, no excessive pressure can be applied.

In particular, when a packaged product as shown in FIG. 3 is formed, if the outer surface of the packaged product is smooth, during the use of the packaged product, the space between the inner package and, for example, the outer box is reduced.
Alternatively, abrasion can be advantageously prevented in that little friction occurs between the inner package and, for example, the intermediate package. Furthermore, if the coating is applied to the packaged product and the surface is relatively smooth, it can be easily removed from the mold by a simple method, which is advantageous. If is relatively small,
It is even more advantageous. For this reason, it is advantageous to use a release agent such as silicone oil, stearate or wax.

FIG. 7 is a schematic perspective view of the container 1 of FIG. 1, with the hinge portion 6 clamped by a clamp 100. The clamp 100 includes an upper surface clamp portion 102 and a lower surface clamp portion 104, whereby the upper surface and the lower surface of the hinge portion 6 are completely covered. Under such conditions, for example, FIG.
When the container 1 is coated from above and below with an injector such as the nozzle 104 'shown in the above, only the bottom part 2 and the lid part 4 are coated,
The hinge portion 6 covered by the clamp 100 is not coated. Thus, it is easy to keep the hinge portion 6 free of this first coating, so that the clamp 100 can be removed before the next second coating can be applied to the container 1. This second coating is only applied to the material forming the hinge part 6 of the container 1 and the bottom part 2 and the lid part 4 are already covered by the first coating, so that it is not possible to apply them directly to these materials. Absent. In fact, while drying the container 1 with hot air, infrared, or similar radiation source, the same clamp 100 is used to heat the hinges more than the other parts.
Can be weakened. As a result, the bottom portion 2 and the lid portion 4 drain moisture faster than the hinge portion 6. Moisture, especially moisture, will act as a softening agent, at least in the hinge part 6, as a softener activator, so that the hinge part 6 is much more flexible than the bottom part 2 or the lid part 4 (flexible). )become. In that regard, after this, after the clamp has been removed, a new coating can be applied to at least the inside of the container, so that at least a large part of the moisture is as little as possible from the hinge part 6.

FIG. 8 shows another method for covering the hinge portion 6 while drying the container 1 and / or the coating 28 applied to the container 1. A plate 106 is provided at some distance above the hinged portion 6 provided with the recess 7 to cover the hinged portion 6. The plate 106 may be wholly or partially impervious to radiation 110 emanating from a radiation source 108, such as a thermal radiation source, an infrared radiator, hot air blowing means, or the like. It can be seen that the radiation does not reach the hinge part 6 or, if at all, its intensity is low.

Therefore, the bottom portion 2 and the lid portion 4 dry faster than the hinge portion 6. In this way, a particularly flexible hinge part 6, a rigid bottom part 2 and a lid part 4 are produced. If necessary, in the same way, the container 1 can also be provided with a non-hinge part, for example the longitudinal edge 1 adjacent to the lip 18 and / or the opening 20.
6, etc. can also be completely or partially covered so that the lid closes better. Due to the presence of the recess 7, the malleability of the hinge 6
ty) is further improved, and the tensile stress and the coating 2 in the skin 26 of the wall 22 are improved.
8 also has the advantage that the principal bending position in the hinge part 6 is also reasonably and clearly defined.

It will be appreciated that in other ways, the different parts of the product may each have a different degree of drying. For example, in the case of the package shown in FIG. 2, the drying of the corners is made slower, so that the flexibility and the shock absorbing power are increased. In the embodiments described below, various base recipes are used for the material for forming the base product. These materials are given Roman numerals in the product examples. As long as the injection molding technique is used, for example, the international patent applications PCT / NL96 / 00377 and PCT / NL96 / 0
0136 etc. may be referred to. It can be understood that the contents relating to these international applications are incorporated herein by reference to these publication numbers. Similarly, the extrusion techniques described in these international applications and other similar techniques can be used. In order to form a product according to the present invention, baking is used herein.
As far as molds are mentioned, the international patent application PCT / NL95 / 000
Reference may be made to 83 as an example. It is understood that the contents relating to this international application are incorporated herein by reference to this publication number.

In the materials to be used, pre-gelinized
2.) the amount of natural polymer used is only slightly less than 5% by weight, preferably 3%
Less or no at all. As a result, the flow path (flow) in the mold
paths) can be narrowed. And this point is, in fact,
This holds for any material that can be used according to the present invention.

In the examples of the materials used, especially those having the components shown in Table 1 are used.

[0059]

[Table 1] Pre-gelled latex ML-100 available from Wurfbain was used as natural rubber.

The coating examples described used, inter alia, those of the components shown in Table 2.

[0061]

[Table 2] * For GH052, P. G or at least P.I. P. G
It is understood that the content of this patent, filed by the Attorney General, is hereby incorporated by reference.

HTI 19102rp is a variant of the synthetic wax HTI 19102M, which is completely repulpable without paraffin. Otherwise, this variant is applied in exactly the same way as HTI 19102M with similar results.

Material A was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
And 75 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum and 120 g of approximately 2.5 mm cellulose fiber (white) in the manner described above. This was mixed with 1500 ml of main water in which 22 ml of silicon oil HY was dissolved, and stirred to obtain a liquid material. From this liquid material, a 100 g portion was removed and subsequently mixed with 15 g of glycerol, 2 g of Cartersol K-RL, and 4 g of polyethylene glycol.

Material B was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
And 75 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum and 120 g of approximately 2.5 mm cellulose fiber (white) in the manner described above. This was mixed with 1500 ml of main water to which 22 ml of silicone oil HY had been added and stirred to obtain a liquid material.

Material C was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
And 75 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum and 120 g of approximately 2.5 mm cellulose fiber (white) in the manner described above. This was mixed with 1500 ml of main water and stirred to obtain a liquid material. From this liquid material, a 100 g portion is removed, followed by 15 g of glycerol, 2 g of Cartersol K-RL, and 4 g of
g of polyethylene glycol. The surface tension of the base product manufactured from material C was 44 dyne / cm.

Material D was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
And 75 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum and 120 g of approximately 2.5 mm cellulose fiber (white) in the manner described above. This was mixed with 1500 ml of main water to which 2.8 g of silicone oil Hy had been added, followed by stirring to obtain a liquid material. The surface tension of the base product manufactured from material D was 33 dyne / cm.

Material E was prepared by mixing 1000 g of potato starch with 2 g of xanthan gum and 6 g of sodium hydrogen carbonate and adding this to 1500 ml of main water in which 22 ml of silicon oil HY was dissolved. This was stirred well to obtain a liquid material.

Material F was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
China Clay Spec, 75 g Hydrocurve 95T, 2 g xanthan gum, 8 g guar gum, 60 g approximately 4 mm hemp fiber, 70 g approximately 8 m
m of viscose fiber and 120 g of white approximately 2.5 mm cellulose fiber. 155 containing 22 ml of silicone oil HY
Stirred with 0 ml of main water. From this solution, a liquid material was obtained by stirring.

Material G was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 50 g
China Clay Spec, 50 g Hydrocurve 95T, 2 g xanthan gum, 8 g guar gum, 120 g white approximately 2.5 mm cellulose fiber,
180 g of approximately 8 mm viscose fiber, 200 g of glycerol and 40
g of sorbitol binding agent. This was stirred in 1700 ml of main water containing 22 ml of silicone oil HY. From this solution, a liquid material was obtained by stirring.

Material H was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite,
g of China Clay Spec, 200 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum, and 120 g of white, approximately 2.5 mm cellulose fiber. This was stirred in 1600 ml of main water containing 22 ml of silicone oil HY. From this solution, a liquid material was obtained by stirring.

Material J was prepared by first mixing 1000 g of potato starch with 2 g of hydroxyapatite,
Made by mixing with 00 g China Clay Spec, 2 g xanthan gum, 8 g guar gum, and 120 g white approximately 2.5 mm cellulose fiber. This was stirred in 1450 ml of main water containing 22 ml of silicone oil HY. From this solution, a liquid material was obtained by stirring. From this liquid material, 10
A 00 g portion was removed, so that 20 g of dextrin, 30 g of basoplaster, 50 g of glycerol and 45 g of polyethylene glycol were stirred.

The material K was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite,
g of China clay spec, 2 g of xanthan gum, 8 g of guar gum, and 120 g of white, approximately 2.5 mm cellulose fiber. This was stirred in 1450 ml of main water containing 22 ml of silicone oil HY. From this solution, a liquid material was obtained by stirring.

The material L was prepared by mixing 1000 g of potato starch with 140 g of China Clay Spec,
140 g of Hydrocurve 95T, 2 g of hydroxyapatite, 2 g of xanthan gum, 8 g of guar gum and 120 g of white, approximately 2.5 mm cellulose fiber, were prepared in the manner described above. This was mixed with 1500 ml of main water and stirred to obtain a liquid material.

Using this material L, a base product was manufactured in a mold with an inner wall, such as a Teflon-registered aluminum mold, without a mold release agent.

The material M was manufactured as follows. In other words, 1000 g of potato starch, 12
0 g of approximately 2.5 mm impregnated cellulose fiber, 20 g of calcium stearate, 75 g of China Clay Spec, 40 g of sorbitol binder, 75 g of hydrocarb 95T, 2 g of hydroxyapatite, 2 g of xanthan gum,
8 g of guar gum and 120 g of approximately 8 mm viscose fiber were mixed.
This was stirred in 1650 ml of main water as described above to form a liquid material.

The material M incorporates a relatively large amount of fibers, which makes it particularly suitable for use in industrial packaging. Such packages must also be coated as they must be highly resistant to vibration and shock. The surface tension at this time is substantially determined by the stearate.

Material N was manufactured as follows. That is, 250 g of the starch derivative P10
X is mixed with 750 g of potato starch, into which 5 g of Dicera 10102
, 10 g calcium stearate, 2 g xanthan gum, 8 g guar gum,
And 120 g of white approximately 2.5 mm viscose fiber were added in the manner described above. This was stirred in 1400 ml of main water.

Material N is an example of a material that is particularly suitable for more industrial applications. And, in consideration of the case of incineration after use, it is preferable that this material has little or no filler. The combination of wax and stearate is chosen so that it can be sufficiently wiped off and, moreover, to obtain a suitable surface tension.

Material O was prepared by mixing 1000 g of potato starch with 2 g of hydroxyapatite, 75 g
Of China Clay Spec, 75 g of Hydrocurve 95T, 2 g of xanthan gum, 8 g of guar gum, and 120 g of white, approximately 2.5 mm cellulose fiber. This was stirred in 1500 ml of main water containing 22 ml of silicone oil HY. From this solution, a liquid material was obtained by stirring. From this liquid material, a 100 g portion was removed, and 75 g of natural rubber and 2 g of Cartersol K-RL were stirred.

[0080]

【Example】

Product Examples The following examples are not intended to be limiting in any way.

Examples 1 to 4 relate to fast food containers made from two different materials.

Example 1 A fast food container as shown in FIG. 1 was manufactured from two different materials in a mold as schematically shown in FIG. Material A was used for hinge 6 and material B was used for bottom 2 and lid 4. Material A was added with Cartersol K-RL and turned blue. Thus, it became apparent that the two materials A and B were distributed. If the same container 1 is manufactured from the same material as the material A except that Cartersol K-RL is not inserted, naturally, the same container having only a different color can be obtained.

The material A is introduced into the hinge forming portion 6 a by the first injector 62, and
4 introduced the material B into the bottom part 2 and the lid part 4. The introduction of the material A starts earlier than the introduction of the material B, and the introduction pressure of the material A is slightly higher than the introduction pressure of the material B so that the material A is not pressed against the hinge forming portion 6a. This is particularly important since material A foams more slowly than material B. Further, for the same reason as described herein, the second injector 64 is formed by a portion 6a forming a hinge portion in the mold.
Place them relatively far apart.

Table 3 shows the manner in which the container 1 was formed, in particular the time intervals, the working temperature, the injection pressure, the dose and the events for each time point.

[0085]

[Table 3] When the container 1 was taken out of the mold as a base product, it became clear that the hinge was particularly easily bent. The relatively high temperature is partially, if not entirely, the reason for this. That is, the flexibility of the hinge portion decreases after cooling. For this reason, the hinge portion absorbs a relatively small amount of water that acts as a softening agent, or at least acts as a softening agent. The four containers produced by the method described above have reached this situation in different ways, as follows.

The first container was left for a while to allow water vapor to diffuse from the ambient air into the container 1. This takes a relatively long time, and the entire container, even the lid and bottom, absorbs moisture. However, at the same time, the hinge portion of the container became very flexible.

The second container was left at 38 ° C. and a relative air humidity of 98%, so that it absorbed water relatively quickly. Again, it can be said that the entire container has absorbed moisture. In this container, the hinge portion became very flexible while retaining shape retention.

In the third container, steam was sprayed on the hinge portion 6. As a result, the hinge portion quickly absorbed moisture. The lid part and / or the bottom part is adapted to not absorb moisture. In this way, a flexible hinge portion was obtained, while the bottom and the lid maintained their rigidity.

In the fourth container, moisture is provided to the hinge portion, and the moisture is diffused to the wall 22. This is theoretically possible, for example, by spraying water on the hinge portion or by providing water to the hinge portion by other means. However, in this example,
A water-based coating was applied to hinge portion 6. For this purpose, in the method shown in FIG. 7, a relatively water-resistant first coating based on a solvent is applied as a primer to the lid and the bottom, and then the water-based coating is applied to the hinge part. And applied to the first coating. Water diffused from the water-based coating to the hinges, and this water accumulated in the hinges. At this time, the water functioned as a softening agent or a softening agent. By such a specific simple and appropriate method, it was possible to obtain the container 1 in which the hinge portion 6 is particularly flexible and the lid portion and the bottom portion are rigid. At the same time, these coatings made the container more suitable for the desired application. Furthermore, by coating,
Water was trapped inside the container wall.

In the container 1 according to this embodiment, the average thickness of the wall is 1.5 mm, and the hinge portion 6 as shown in FIG. Endured without breaking. Also in the lateral direction, the hinge part has sufficient flexibility,
On the other hand, the stiffness of the bottom and lid portions was very good, maintaining that goodness even when heated above 60 ° C. The container weighed 15.1 g after being removed from the mold, and 16.2 g after further coating. It was found that the line separating the first material and the second material was a substantially perfect straight line. At the same time, material A remained almost completely confined within hinge portion 6.

Example 2 A fast food container of FIG. 1 was manufactured using the mold of FIG. First injector 62
, And the material D was introduced by the second injector 64. The weight of the container before coating was 13.7 g.

The first coating is a solution of 30 g of powdered CAP 504.2 dissolved in a mixture of 400 ml of ethyl alcohol and 100 ml of ethyl acetate, and is a high volume low pressure (HVLP) spray device. , Using a Walter Pilot 93-ND type (HVLP device) at a pressure of 2.7 bar. After applying this coating on both sides, 10
Dry in oven at 0 ° C. for 20 seconds. In this example, during the application of the first coating, the hinge was covered by pinching the container at the hinge, as shown in FIG. Next, a second coating was applied to both surfaces of the first coating and the hinge portion. This second coating is a 600 ml DV
L9012.0.41 and 400 ml of IP12 were stirred with a stirrer (Heidolph).
RZR2041). This solution was transferred to the reservoir of an airless injector (Nordson airless system, type 64B, pumps 1 to 30). This injector is connected to a working pressure of compressed air of 33 bar, so that a cross-cut 0
The pressure in the 3/16 type nozzle is 90 bar. After this second coating is applied to both sides, the drier (Ferrari 700W) is used at about 60 ° C.
For 20 seconds. The surface tension of the first coating before application is 30d
At yne / cm, the surface tension of the second coating before application was 32 dyne / cm. Upon application, the first layer actually functioned as an undercoat, increasing the surface tension. Further, the first layer has a second layer at least in the bottom portion 2 and the lid portion 4.
It also served as a barrier to the water contained in the coating.

During the application of the second coating, the protection of the hinge portion was not performed by the first coating (surface tension of 38 dyne / cm) having water resistance at least temporarily, and the surface tension of the hinge portion 6 was compared. Because it is relatively high (44 dyne / cm), the hinge 6 absorbs a relatively large amount of water, especially a relatively large amount of water from the second coating. Hinges that are particularly flexible, especially because the water acts as a softener, or because the water at least strengthens the softener for glycerol to the material in question, especially the lid and bottom portions was gotten. After coating and drying, the container weighs 17.6 g and has a surface tension of 20 dyne /
cm and water vapor transmission ra
te; WVT rate) was ^8g / m 2 / 24h. During coating, the hinge portion absorbed 0.3 g of water, while the bottom and lid portions did not absorb any water.

This container has a particularly high water vapor transmission rate, whereas it only absorbs water during the coating. That is, the container was microclimatically, especially at the bottom and lid, and was particularly dry. As a result, this container appropriately resisted heat resistance and water resistance (water vapor resistance), and the hinge portion was particularly easily bent. On the other hand, the lid portion 4 and the bottom portion 2 were relatively hard, had shape retention, and were reliably coated. The coating adhered well, especially at the hinge.

Example 3 A fast food container was produced as in Example 2. However, another material C containing no glycerol was used. Consequently, the softener effect of the hinge portion of the container is provided primarily by the moisture contained in the hinge portion.

Example 3A A fast food container was prepared as in Example 2. However, the blue colorant (
2 g of Cartersol K-RL) was added to the material forming the lid and hinge parts. Thus, a container having an even more enjoyable appearance was obtained.

Example 4 A fast food container was made according to Example 1. However, material O was used instead of material A. The hinge portion of the container 1 manufactured according to this embodiment was particularly easily bent, and was hardly affected by temperature and humidity. On the other hand, the hinge portion had a relatively thin structure. These advantages have been achieved in particular by the use of natural rubber instead of a softener.

Example 5 A tray for shaver packaging is provided with a bottom box and a lid used separately from the bottom box.
The tray was then made from two materials by the method described in more detail below. This tray was injection-molded integrally with a mold similar to the mold shown in FIG. In this tray, since the bottom box and the lid are connected by the edge which is easy to cut, the lid was easily separated from the bottom box. The structure of the tray is the same as that of the holder of FIG. 1, except that the hinge portion 6 is configured in this tray as the easy-to-cut edge mentioned here. The frangible edge was made from material E introduced from the first injector 62, and the bottom box and lid were made from material F introduced from the second injector 64. Also in this example, the injection of material E started slightly earlier than the injection of material F for the same reason as described above.

Table 4 shows the process when manufacturing the trays, in particular the time intervals, operating temperatures, injection pressures, doses, and events by time point.

[0100]

[Table 4] The tray of this example was released from the mold as an integral type. Then, only the edge which was substantially easily cut was formed from the material E. In particular, a blowing agent is used for the material E (sodium hydrogen carbonate in this embodiment, but other blowing agents can of course be applied)
, A relatively large hole was formed therein. As a result,
The structure was relatively brittle and easily broken after molding. This is partially, if not entirely, the reason for the reduction of fillers such as hydrocarbons and China clay specifications. The bottom box and lid, on the other hand, were strong and relatively rigid.
At the same time, however, it was clear that there was sufficient flexibility to hold the shaver to be packaged. These bottom boxes and lids could be easily separated while packaging the shaver, and the packaging was made available for full automation.

Immediately after removal from the mold, the tray weighs 58.3 g and the average wall thickness is 3.0.
mm. The final weight of the tray was 62.5 g. After the bottom box and lid were separated, the edges after separation were smooth and straight.

Example 6 A telephone package as shown in FIG. 3 was manufactured from two different materials in a mold as described with reference to FIG. The use of these two different materials is
For example, provide a shock-absorbing package, even at the corners and, if necessary, the edges of the package so that the phone will not be damaged if the packaged phone falls, and at the same time at a low cost. The intention is that it can be manufactured in a fashion. For this purpose, the material G was injected into the mold of FIG. 6 by the second injector 84 and the material H was injected by the first injector 82.

Table 5 shows the process when manufacturing the trays, in particular the time intervals, operating temperatures, injection pressures, doses, and events by time point.

[0104]

[Table 5] After manufacturing a package as a base product, it is baked at room temperature with a relative humidity of 60% (
(+ Or -15%) and left for a while to optimize the humidity of the product. After taking out the product, the package weighs 65.2 g and the wall thickness averages 3
mm. Final weight was 68.5 g.

The material G forming the corner portion 85 of the edge 86 contained relatively many fibers, and the lengths of these fibers were relatively longer than those of the material H. In addition, the corners 85 are more flexible and less fragile than the other parts, so that the corners absorb shocks particularly well. Since only the corner portion 85 is manufactured from the material G, the material G is relatively expensive due to the fiber used. However, since the material other than the corner portion is manufactured from the less expensive material H, the packaging is economical. It could be produced in an advantageous way. In particular, if the entire package was made from material G, the flexibility of this material would have prolonged the cycle time and would have considerably complicated the packaging gap. All corners were made from material G. The materials G and H were then mixed slightly near the corners before cross-linking. At edge 86 there may be some variation in the material ratio, but no material H is present excessively anywhere on the edge.

The package was subjected to a standard drop test. In this drop test, the phone was dropped from a height of 1 m to a wrapped point. The package of Example 6 withstood this test considerably better than a package made entirely from material H.

Example 7 The cup of FIG. 2 having a volume of 0.4 liter was made from two materials in the mold of FIG. The rim 36 was constructed from material J, configured as an edge to which the lid fit. The wall 34 and the bottom 32 were made from material K. Material J was injected by two first injectors 72 and material K was injected by a second injector 74. The cup used a traditional type of plastic lid from the fast food industry.

Table 6 shows the process in making the cups, in particular the time intervals, operating temperatures, injection pressures, doses, and events by time point.

The cup 30 is rigid with shape retention, while the upper rim 36 has just enough flexibility to have enough resilience to press the lid against the rim 36,
The lid was adequately held. Cup 3 when removed from mold
0 weighed 10.2 g and the wall thickness was 1.5 mm. Not surprisingly,
After inhaling the water, the weight of the cup became 12.0 g.

Example 8 Combusto cones were produced in an eight-layer mold. These molds are interconnected by a star-shaped injection groove from two injectors. combusto
The cone was a frustoconical cup with a wall thickness of 1 mm, a height of 18 mm, and a mean section diameter of 13.5 mm. By means of the first injector, sufficient material N was pushed into these injection grooves, especially to fill the eight small mold cavities. Thereafter, the material E was pushed into these injection grooves by the second injector. Thus, the material N could be transferred to the mold cavity. Crosslinking of the natural polymer then occurred in the mold cavity and the injection channel. The product was removed from the mold after baking. The injection groove formed from material E has a brittle structure, while the cone is relatively stiff and strong, so that the cone can be easily broken and loosened. Such a cone is known as "Method for m," filed on the same day as the present invention.
This is described in a patent application entitled "anufacturing coated products".

Examples 9 to 11 relate to the use of a coating to improve at least the conditioning material properties of the product. The name of the invention, filed by the present applicant on the same day as the invention described above, is “Method for manufacturing c.
Further examples of such coatings and their use are described in the patent application "coated products", the content of which is incorporated herein by reference. The use of such a coating allows properties such as hardness, flexibility, water resistance (steam resistance), brittleness, moisture sensitivity, and heat resistance to be varied, especially for different parts. When used, it is further affected.

Example 9 The coating of this example comprised 60% by volume of HTI 9102 and 40% by volume of ET1. Since the capacity of ET1 was relatively high, it was found that wax processing was easy. Manufactured from material N, own weight 19g and surface tension 32dyn
The e / cm cup of FIG. 2 was dried in air at 50 ° C. for 25 seconds before applying the coating as described in Example 2. Before applying the coating, the surface tension of the coating was 32 dyne / cm, but after drying it was 21 dyne / cm. As can be seen from the various examples, the surface tension of the coating when applied at a temperature of approximately 40 to 50 ° C. is reduced by approximately 2 to 3 dyne / cm. This is both for heating the coating and for applying the coating to the hot base product. In this way, the coating was further improved.

[0113] The moisture permeability (WVT rate) was ^20g / m 2 / 24h. The coating was flexible and adhered well to the base product. On the other hand, a reasonably good thin film was obtained. Thus, a heat-resistant cup having advantageous properties was obtained.

Example 10 2.2 using a HVLP apparatus equipped with a 2.0 mm nozzle in a fast food container manufactured from the material L and having a weight of 16.0 g and a surface tension of 40 dyne / cm.
At bar, the coating was applied on both sides. The coating is 50% by volume DV
L9012.0.41, 35% by volume of IP12, and 15% by volume of 50 ° C. main water. As a solution, the surface tension of the coating is 35 dyne
/ Cm. During the application of the coating, the container absorbed 1.4 g of water. The weight of the coating after drying for 25 seconds in air at 60 ° C. is 18.
8 g, the surface tension of this coating is 20 dyne / cm, and the moisture permeability (W
VT rate) was ^40g / m 2 / 24h. This well-formed film-forming coating was particularly susceptible to flexing.

Although this coating has good moisture permeability, a relatively large amount of water eventually enters the substrate during application, so that the product becomes heavy, especially at temperatures above about 60 ° C. It does not have very good resistance to them. However, the flexibility of the coating is outstanding, such that the product parts connecting the product parts do not break or tear when moved or hinged.

Example 11 A packaging tray for a telephone as shown in FIG. Its own weight was 68.4 g, and the surface tension before coating was 34 dyne / cm.

The coating contained 80% GH052 by volume and 20% IP12 by volume. The coating was applied using an HVLP device with a 1.3 mm nozzle.
At 4 bar, the coating was applied to all sides of the tray. The coating was then dried with air at 60 ° C. for 45 seconds. During the coating, the tray absorbed 3.2 g of water, but the weight of the tray after drying was 78.2 g. The coating had a surface tension of 31 dyne / cm before application. After drying, the coating has a surface tension of 42 dyne / cm and a water vapor transmission rate (WVT rate) of 70 g / cm2.
m ² / 24h. This solution was found to be unstable, but good processing can be achieved, especially with intermittent or continuous stirring.

The addition of IP12, which reduces surface tension, resulted in a coating that flattened during application and thus provided particularly good film formation. The water vapor transmission rate (WVT rate) of this coating was not very low and the product absorbed a relatively large amount of water. The coating became particularly strong and hard after drying, but sufficient flexibility was nevertheless maintained.

The present invention is in no way limited to the embodiments shown and described herein above. Many modifications thereof are possible within the framework of the invention as defined by the appended claims.

Thus, more than one material may be used in the same product to obtain the desired properties. Also, more or other coatings may be used on top of one coating. When a relatively large amount of a softening agent is contained in the hinge portion, it is desirable to provide a recess in the hinge portion because optimal characteristics can be obtained. If necessary, during or immediately after the molding of the product, the hinge part can be gently squeezed to partially break the cell structure, so that the hinge part can be in particular the skin or other side and non-skin, and in some cases Will work through the coating. Furthermore, many other types of products can be constructed and manufactured in a similar manner, and the materials and / or coatings can then be selected depending on the desired properties.

[Brief description of the drawings]

FIG. 1 shows a package as a hamburger package manufactured by the method according to the present invention;
Particularly, a diagram showing a so-called clamshell.

FIG. 1A schematically shows a cross section of a wall of a product according to the invention.

FIG. 2 shows a frustoconical container as a coffee cup manufactured by the method according to the invention.

FIG. 3 shows a part of a package, in particular an inner package, for a packaged product manufactured by the method according to the invention.

FIG. 4 schematically shows a female part for forming the container of FIG. 1 made of at least two materials.

5 schematically shows a female part for forming the cup of FIG. 2 made of at least two materials.

FIG. 6 schematically shows a female part for forming the inner package of FIG. 3 made of at least two materials.

FIG. 7 schematically shows the container of FIG. 1 with hinged parts tightened for coating application.

8 schematically shows in cross-section a part of the container of FIG. 1 in which, during drying, a covering means for the hinge part is provided.

[Procedure amendment]

[Submission date] October 25, 2001 (2001.10.25)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 101/00 ZBP C08L 101/00 ZBP C09D 101/00 C09D 101/00 109/08 109/08 123/06 123/06 129/04 129/04 133/00 133/00 161/28 161/28 167/04 167/04 171/02 171/02 191/06 191/06 // B29K 1:00 B29K 1:00 105 : 04 105: 04 105: 16 105: 16 B29L 22:00 B29L 22:00 (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH) , GM, KE, LS, MW, SD, SL, SZ, TZ, UG ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR , KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZWF Term (reference) 4F071 AA08 AA11 AE02 AE04 AE09 AE17 AF26 BB05 BC04 4F072 AA08 AB03 AB15 AD01 AD02 AE01 AE09 AL01 4F206 AA01 AB02 AB11 AG07 AG20 AG30 JA07 JB21 JN12 JW50 4J002 AB011 AB012 AB0 41 AB051 AC011 AF031 DH046 EG047 EL027 EN137 EU187 FA042 FA046 FD016 FD147 GG01 4J038 BA001 BA021 BA121 BA211 BA212 CB021 CC041 CE021 CF021 CG001 DA161 DD081 DF011 JA20 JA21 JA47 JB01 JB24 JC24 KA03

Claims (62)

[Claims] 1. A material comprising at least a natural polymer, such as starch, is introduced into or through a mold, and the material in the mold is heated to cause at least cross-linking of the natural polymer and to provide at least one first product of the product. A method of manufacturing a product, wherein a material property of a first part is different from a material property of an adjacent part by acting on a material composition of the part. 2. The at least one first portion being formed from at least one portion adjacent to the first portion, preferably a second material having a different composition than the first material forming all the portions. The method according to claim 1, wherein: 3. The at least one first portion at least in the mold, wherein a relatively high concentration of the softener is obtained and / or maintained, and the softness of the at least one first portion is increased by the first portion. 3. The manufacturing method according to claim 2, wherein the forming is performed so as to be higher than the flexibility of an adjacent part. 4. After the manufacture of the product, a large amount of softener or a particular type of softener remains in the first part, so that the flexibility of the first part is greater than the flexibility of the part adjacent thereto. 4. The method according to claim 2, wherein a second material is selected. 5. At least the at least one first portion in the mold has a relatively low concentration of softener obtained and / or maintained, and the at least one of the at least one first portion has a degree of softness. 3. The method according to claim 2, wherein the first portion is formed so as to have a lower degree of flexibility than a portion adjacent to the first portion. 6. After the manufacture of the product, a small amount of softener or a certain type of softener remains in the first part, whereby the brittleness of at least a part thereof is reduced by the brittleness of the wall part of the part adjacent thereto. The method according to any one of claims 2 to 5, wherein the second material is selected so as to be larger. 7. After the manufacture of the product, the first part is obtained with fibers having a concentration and / or orientation different from the concentration, orientation and / or type of fibers present in other parts and / or
7. The method according to claim 2, wherein the second material is selected so as to contain different types of fibers. 8. At least during the manufacture of the product, a blowing agent and / or filler of a different concentration and / or type is obtained in the first part than in the other parts of the product, whereby the first part is obtained. The method according to any one of claims 2 to 7, wherein the second material is selected so as to obtain a product forming a structure having a different density from other parts of the product. 9. The first part is obtained with a different concentration and / or a specific type of colorant than the other parts of the product, whereby the first part has a different color than the other parts of the product. 3. The method according to claim 2, wherein the second material is selected so as to obtain a product having the following characteristics.
9. The production method according to any one of items 1 to 8. 10. At least during the manufacture of the product, a different concentration and / or type of crosslinker is obtained in the first part than in the other parts of the product, whereby the first part is freed from the other parts of the product. The method according to any one of claims 2 to 9, wherein the second material is selected so that a product having a structure having a density different from that of the part is obtained. 11. The method according to claim 2, wherein the second material is introduced during the flow of the first material. 12. A second material is introduced into a region forming the first portion of the mold, and the first material is introduced into a plurality of regions forming a portion adjacent to the first region. 12. The method according to claim 2, wherein the first and second materials are forcibly brought into contact with each other and connected to each other. 13. The method according to claim 2, wherein the first and second materials in the mold are connected to each other before or at the start of the crosslinking of the natural polymer. . 14. The method according to claim 2, wherein the first material and the second material are introduced at staggered times, and the introduction of the second material is started before the introduction of the first material. The production method according to any one of the above. 15. The method according to claim 15, wherein the first material in the mold is placed under a first pressure, the second material in the mold is placed under a second pressure, and a difference is provided between the first pressure and the second pressure. The method according to claim 2, wherein 16. The method according to claim 1, wherein the or each material is introduced into a mold under a pressure higher than the atmospheric pressure, preferably by injection molding. 17. The method according to claim 1, wherein at least three different materials are used for producing the product. 18. Manufacture of a product having a foamed foam structure, said first part having at least a hingeable part, wherein said part has a different concentration of a softener or a different concentration from the other parts.
A softener of a type that is more flexible in the hingeable portion than in the wall portion of the adjacent portion is treated and / or maintained, and is preferably located at a location remote from the at least one first portion. 18. The method according to claim 1, wherein at least one second first part is provided, and in particular the second first part is designed as a closing element. 19. . 19. The method according to claim 1, wherein a wafer-baking baking mold is used as the mold. 20. The method according to claim 1, wherein at least the at least one first part is processed such that after forming by the mold, the material properties of the first part are changed at least with respect to parts adjacent thereto. Item 20. The method according to any one of Items 1 to 19. 21. A coating is applied to at least a portion of the at least one first portion, the coating comprising at least the first material and an active component, thereby causing a reaction between the active ingredient and the first material. 21. A method according to any of the preceding claims, characterized in that the following occurs, whereby the material properties of the first part are affected. 22. The method according to claim 21, wherein at least a portion adjacent to the first portion is coated before applying the first coating. 23. A portion adjacent to the first portion is at least partially coated with a second coating, the second coating being substantially impermeable to the reactive components of the first coating, 23. The method of claim 22, wherein the first portion is at least partially prevented from entering the second coating. 24. The method according to claim 23, wherein a second coating having a higher hardness than the first coating, a relatively low permeability to the reactive component and a high resistance is used. 25. The method according to claim 23, wherein the first coating is applied on the second coating. 26. The method according to claim 21, wherein an aqueous coating is used as the first coating. 27. The method according to claim 21, wherein a relatively soft elastic coating is used as the first coating. 28. As a first coating, components from the following groups: acrylic binder, latex, styrene-butadiene latex, polyvinyl alcohol, polyvinyl acetate, polyacrylate, polyethylene glycol,
The method according to any one of claims 21 to 27, wherein a coating containing polylactic acid, a synthetic polymer, a natural polymer, a natural wax (for example, an ionic polyethylene wax) or a derivative thereof, or a combination thereof is used. Method. 29. As a second coating, components from the following groups: melamine, acrylic binders, water-resistant lacquers (eg cellulose lacquers), cellulose acetate propionate, polyethylene, polyacrylates, synthetic polymers, natural polymers, The method according to any one of claims 23 to 28, wherein a coating containing a synthetic wax, a natural wax, polylactic acid, a derivative thereof, or a combination thereof is used. 30. A crosslinking agent from the group consisting of: zirconium acetate, zirconium ammonium carboxylate, urea formaldehyde, melamine formaldehyde, glyoxal, polyamidoamine-epichlorohydrin, epoxide, trimetaphosphate, derivatives thereof, or a derivative thereof. 29. The combination according to claim 28, wherein the combination is added to the first and / or second coating.
Or the production method according to 29. 31. The method according to claim 28, wherein at least one wax is combined with at least one of the above components in the first coating. 32. The method of claim 28, wherein the first and second coatings are each formed substantially all from one of the components. 33. The method according to claim 1, wherein the first part is designed as a hinge part, the hinge part having at least one recess, in particular at least one groove extending over the width of the hinge part. The production method according to any one of the above. 34. The method according to claim 33, wherein at least one depression is provided at a hinge portion in the mold during or immediately before the occurrence of crosslinking of the natural polymer. 35. The method according to claim 33, wherein at least one depression is provided in the hinge part when the hinge part contains a relatively high concentration of a softening agent. 36. The method according to claim 33, wherein a relatively high concentration of the softener is obtained and / or maintained in the hinge portion. 37. The method according to claim 1, wherein a softening agent is introduced into the first part after crosslinking of the natural polymer. 38. The reactive component is added to the first part inside and / or outside the mold and at least substantially prevents it from flowing to other parts, so that the softener has a relatively large particle size and / or high particle size. The method according to any one of claims 1 to 37, having a viscosity. 39. The method according to claim 38, wherein at least a fatty, oily or waxy component is used as the reactive component. 40. As the softener, at least one of the following groups, water, polyol, glycol, glycerol, glycerin, polyethylene glycol, polypropylene glycol, propylene glycol, sorbitol, glucose, derivatives thereof, or a combination of these softeners The method according to any one of claims 1 to 39, wherein: 41. The method according to claim 1, wherein the first part is at least partially compressed during at least partial crosslinking of the natural polymer. 42. The method according to claim 1, wherein the surface tension of at least the first part of the product containing the crosslinked natural fibers is adjusted by applying an active ingredient in or on at least the first part. 41. The production method according to any one of 41. 43. A coating according to claim 1, wherein at least a part of the product is coated, the surface tension of the coating being substantially equal to or lower than the surface tension of the coated product part. The production method described in Crab. 44. The method according to claim 1, wherein a coating is applied to the product, the coating comprising a crosslinking agent for the material, in particular a natural polymer contained in the material. 45. The method according to claim 1, wherein at least two coatings are applied at least partially overlying, at least one of the coatings comprising an active ingredient capable of reacting with at least one other coating. 44. The production method according to any one of items 44. 46. The method according to claim 45, wherein at least a crosslinking agent is used as an active ingredient. 47. Gripping the first part of the product to at least almost completely cover it,
47. The method according to any of claims 21 to 46, characterized in that the first part is opened after applying the second coating to the other part, in particular by spraying, and then the second coating is applied by spraying. Production method. 48. An article of manufacture made by baking at least partially in a mold, wherein at least a first portion has different material properties than an adjacent portion. 49. A product having a foamed foam structure comprising a first product portion and a second product portion connected through the first portion, wherein the first portion has relatively large cells. On both sides are covered by relatively small air bubbles and an outer layer of a dense structure, at least a part of the first part is provided with a first layer on at least one of its outer layers at least almost immediately after product formation. Containing a higher concentration of softener than the portion adjacent to the portion and / or a different type of softener than the adjacent portion, wherein at least the at least one outer layer has a higher degree of softness than the outer layer of the adjacent portion 49. The product of claim 48, wherein: 50. The method according to claim 48, wherein the first part is at least substantially made of a second material having a composition different from the composition of the at least one first material from which the adjacent part is made. Or the product of 49. 51. A method for applying a first coating to at least a portion of at least one outer layer of a first portion, wherein the adjacent portion has at least one outer layer leading to the outer layer, wherein the adjacent portion includes the at least one outer layer. Applying a second coating leading to the outer layer, the second coating being relatively sealed, at least a first part sealed against components reactive with the material being manufactured, and being waterproof and water-resistant; A product as claimed in any one of claims 48 to 50. 52. The article of claim 51, wherein the second coating on the outer layer is at least partially covered by the first coating. 53. The article of claim 51 or 52, wherein the first coating is more flexible and has a higher tensile strength than the second coating. 54. The at least one first portion is a hinge portion, the hinge portion including at least one indentation, wherein the indentation has a width of the hinge portion on the side of the hinge portion that faces inwardly of the hinge movement during use. 54. The product of any of claims 48 to 53, wherein the product is at least one groove extending in a direction. 55. The method according to claim 48, wherein the first portion includes at least one opening.
55. The product according to any one of items 54 to 54. 56. The method according to claim 56, wherein the first portion is at least one of the outer layers and preferably at least one of the outer layers and an adjacent portion of the core, the concentration of a comparable softener in the portion adjacent to the first portion. A high concentration softening agent is contained.
5. The product according to any of 5. 57. The product of claim 56, wherein said softener is selected from the group consisting of oils, fats, waxes, alcohols, and sugars. 58. The part adjacent to said first part on both sides in the form of a shell, one of these parts being able to serve as a lid for the other part.
7. The product according to any of 7. 59. The product according to claim 48, wherein the product comprises a different concentration and / or type of fibers and / or fibers in the first part than in the adjacent part. . 60. Injection suitable for use with biodegradable materials, comprising at least a first injection means for introducing the first material into the mold and at least a second injection means for introducing the second material into the same mold. An injection molding apparatus, characterized in that the molding apparatus is provided with heating means for the mold and means for connecting to at least the heating means for the mold or the mold. 61. A material for use in a method according to any one of claims 1 to 47 or a product according to any one of claims 48 to 59. 62. A coating for use in a method according to any of claims 20 to 47 or a product according to any of claims 51 to 59.